Fits select 1999-2003 Dodge Dakota, Durango, Ram 1500, Ram 2500, Ram 3500, and Ram Vans.

NGK 53027 ultra-low resistance mag core wire sets are engineered to provide maximum conductivity and durability for Dodge ignition systems. Featuring a stainless steel winding over a premium ferrite magnetic core, these wires deliver a more powerful spark while providing superior EMI/RFI noise suppression to protect sensitive vehicle electronics.

Built to handle extreme engine bay heat, the high-temperature silicone outer jacket and inner EPDM/silicone insulation maintain excellent dielectric strength. The spark plug boots are bonded to the NGK cable using a specialized silicone sealer, creating a watertight seal that prevents moisture from compromising the ignition connection. For maximum terminal retention, the stainless steel terminals utilize up to three serrated crimps to bite into the cable jacket and inner insulation.

• Manufacturer Part Number: 53027
• Core Construction: Ferrite magnetic core with stainless steel winding
• Insulation: High-temperature silicone outer jacket and EPDM/silicone inner layer
• Terminals: Stainless steel with up to 3 serrated crimps
• Connections: Corrosion-resistant, locking C-shaped spring clips for a positive fit
• Seal: Silicone-sealed boots for a watertight connection
• EMI/RFI Suppression: Advanced noise suppression for on-board electronics

Fits select 2003-2005 Dodge Ram 1500, 2500, 3500 and 2004-2005 Dodge Durango. These NGK ultra-low resistance mag core wire sets are designed to provide maximum spark energy and long-term durability for high-voltage ignition systems.

Constructed with a premium ferrite magnetic core and stainless steel winding, the NGK 53020 set delivers ultra-low resistance for a more powerful spark while maintaining excellent EMI/RFI noise suppression. The high-temp silicone outer jacket and EPDM/silicone inner insulation provide superior dielectric strength, protecting against voltage leaks in harsh engine bay environments.

• Manufacturer Part Number: 53020
• Low-resistance magnetic core for increased spark efficiency and EMI/RFI suppression
• High-temperature silicone outer jacket resists oil, heat, and chemicals
• Watertight spark plug boots sealed with silicone for moisture protection
• Stainless steel terminals with up to 3 serrated crimps for maximum retention
• Corrosion-resistant locking C-shaped spring clip for secure plug connections
• Limited lifetime warranty provided by NGK

Fits select 2001-2003 Ford Ranger and Mazda B3000 models.

NGK ultra-low resistance mag core wire sets are engineered to provide maximum conductivity for a more powerful spark while maintaining exceptional durability under high-heat conditions. This set (MPN 52014) utilizes a premium ferrite magnetic core with stainless steel winding to deliver low resistance and superior EMI/RFI noise suppression, preventing interference with sensitive vehicle electronics.

• High-temp silicone outer jacket and EPDM/silicone inner insulation offer excellent dielectric strength.
• Spark plug boots are factory-glued with silicone sealer to ensure a watertight seal at the cable interface.
• Stainless steel terminals feature up to three serrated crimps for high retention strength and reliable contact.
• Corrosion-resistant, locking C-shaped spring clips provide a positive, secure connection to the spark plug.
• OE-specified boot designs ensure a direct fit and easy installation on Ford and Mazda 3.0L ignition systems.

Fits select 2008-2015 Buick, Cadillac, Chevrolet, GMC, Hummer, Pontiac, and Saab vehicles (V8 engines).

NGK ultra-low resistance mag core wire sets are engineered to deliver maximum spark energy while maintaining superior durability. These wires feature a stainless steel winding over a premium ferrite magnetic core, providing a powerful spark and excellent EMI/RFI noise suppression. The high-temperature premium silicone outer jacket, combined with EPDM and silicone inner insulation, ensures high dielectric strength to contain high-voltage currents in demanding engine environments.

• Manufacturer Part Number: 51440
• Core: Stainless steel winding over a premium ferrite magnetic core
• Insulation: High-temp silicone outer jacket with EPDM/silicone inner insulation
• Terminals: Stainless steel with up to 3 serrated crimps for high retention strength
• Boots: Watertight seal achieved with silicone sealer glued to the NGK cable
• Connectivity: Locking C-shaped spring clip with corrosion-resistant plating
• EMI/RFI Suppression: Ultra-low resistance design for noise-free performance
• Warranty: Limited Lifetime Warranty

Fits select 2005-2008 Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, and Saab models. This NGK spark plug wire set (MPN 51436) is engineered to deliver maximum voltage while providing superior durability in high-heat environments.

Constructed with a premium ferrite magnetic core and stainless steel winding, these wires provide ultra-low resistance for a more powerful spark while maintaining excellent EMI/RFI noise suppression. The high-temperature silicone outer jacket and EPDM/silicone inner insulation are designed to contain high voltage currents and provide exceptional dielectric strength. For a secure, watertight installation, the spark plug boots are glued with a specialized silicone sealer, and the stainless steel terminals utilize up to three serrated crimps for maximum retention strength.

• Manufacturer Part Number: 51436
• Ultra-low resistance mag core for superior spark delivery
• High-temp premium silicone outer jacket protects against engine heat
• Stainless steel winding over ferrite magnetic core suppresses electrical noise
• Locking C-shaped spring clip with corrosion-resistant plating for secure terminal connection
• Watertight silicone boot seals prevent moisture intrusion
• Limited Lifetime Warranty

Fits select 1959-1972 Chevrolet, GMC, and Pontiac models including Bel Air, Camaro, Corvette, Firebird, GTO, and Grand Prix.

Ensure consistent voltage delivery and maximum spark energy with this NGK ultra-low resistance mag core wire set. Designed to withstand the rigorous demands of vintage engine bays, these wires feature a high-temperature silicone outer jacket and inner EPDM/silicone insulation for superior dielectric strength. The construction utilizes stainless steel winding over a premium ferrite magnetic core, delivering ultra-low resistance for a more powerful spark while maintaining critical EMI/RFI noise suppression for clean operation.

• Mag Core Technology: Stainless steel winding over a ferrite magnetic core ensures ultra-low resistance.
• Durability: High-temp silicone outer jacket resists heat, oil, and chemical degradation.
• Secure Connections: Stainless steel terminals feature up to three serrated crimps for high retention strength.
• Positive Engagement: Locking C-shaped spring clips with corrosion-resistant plating ensure a secure fit on the spark plug.
• Watertight Seal: Boots are glued to the cable with a silicone sealer to prevent moisture intrusion.
• MPN: 51428

Fits 1974-1982 Chevrolet Corvette models, including Base, Stingray, Collector's Edition, Indianapolis 500 Pace Car, and Silver Anniversary Edition.

Restore reliable ignition performance and superior noise suppression with the NGK 51376 spark plug wire set. Engineered with an ultra-low resistance magnetic ferrite core and stainless steel winding, these wires deliver maximum spark energy while protecting sensitive electronics from EMI/RFI interference. The high-temperature silicone outer jacket and inner EPDM/silicone insulation provide excellent dielectric strength and durability in extreme engine bay heat.

These wires feature stainless steel terminals with up to three serrated crimps for high retention strength. The spark plug boots are bonded to the cable with a silicone sealer to ensure a watertight connection, while the corrosion-resistant locking C-shaped spring clips provide a secure fit on the plug terminal.

• Manufacturer Part Number: 51376
• Magnetic ferrite core with stainless steel winding for ultra-low resistance
• High-temperature premium silicone outer jacket for heat and chemical resistance
• Inner EPDM/silicone insulation for maximum dielectric strength
• Stainless steel terminals with up to 3 serrated crimps for high retention
• Watertight silicone-sealed boots and corrosion-resistant spring clips
• Limited Lifetime Warranty (see package for details)

Fits select 1996-2002 Cadillac Escalade, Chevrolet C/K 1500-3500 series, Express, Tahoe, and GMC Sierra, Savana, and Yukon models.

The NGK 51070 spark plug wire set is engineered to deliver maximum performance and long-term durability for GM truck and van ignition systems. Featuring an ultra-low resistance magnetic core, these wires provide a more powerful spark while maintaining superior EMI/RFI noise suppression. The high-temperature silicone outer jacket, paired with EPDM inner insulation, offers excellent dielectric strength to contain high-voltage currents and resist engine bay heat.

• Ultra-low resistance magnetic core for optimized spark delivery
• Stainless steel winding over a premium ferrite core for noise suppression
• High-temp premium silicone outer jacket and EPDM/silicone inner insulation
• OE-specified boots with silicone sealer for a watertight connection
• Stainless steel terminals with up to 3 serrated crimps for maximum retention
• Corrosion-resistant locking C-shaped spring clip ensures a secure connection
• Manufacturer Part Number: 51070
• Limited Lifetime Warranty (see package for details)

Fits select 1999-2007 Cadillac Escalade, Chevrolet Silverado, Suburban, Tahoe, and Avalanche, GMC Sierra and Yukon, and Hummer H2.

NGK ultra-low resistance mag core wire sets provide professional-grade performance and long-term durability. These wires feature a high-temp premium silicone outer jacket and EPDM/silicone inner insulation to contain high-voltage currents and maintain dielectric strength. The core uses stainless steel winding over a premium ferrite magnetic core to deliver ultra-low resistance for a more powerful spark while maintaining excellent EMI/RFI noise suppression to protect onboard electronics.

• Stainless steel terminals utilize up to 3 serrated crimps to ensure high terminal retention strength.
• Locking C-shaped spring clip with corrosion-resistant plating provides a secure, positive connection.
• Spark plug boots are factory-glued with silicone sealer for a completely watertight seal.
• OE-specified boot designs ensure a precise fit and easy installation on factory distributor and spark plug locations.
• High-temperature silicone construction resists heat soak and chemical degradation.
• Manufacturer Part Number: 51033

Fits select 1999-2006 Buick LeSabre, Lucerne, and Park Avenue, Oldsmobile 88 and LSS, and Pontiac Bonneville models. This NGK spark plug wire set is engineered to meet or exceed OE specifications for fit, durability, and ignition performance.

Constructed with an ultra-low resistance magnetic core and stainless steel winding, these wires deliver a powerful spark while maintaining excellent EMI/RFI noise suppression. The dual-layer insulation—featuring a high-temperature silicone outer jacket and an inner EPDM/silicone layer—provides superior dielectric strength to contain high-voltage currents. Each boot is sealed to the cable with a silicone sealer for a watertight connection, while serrated crimps and a locking C-shaped spring clip ensure maximum terminal retention and a secure fitment at the spark plug.

• Manufacturer Part Number: 51032
• Core Construction: Ferrite magnetic core with stainless steel winding
• Insulation Material: High-temp silicone outer jacket with EPDM/silicone inner layer
• Terminal Design: Stainless steel with up to 3 serrated crimps for high retention
• Boot Features: Watertight silicone sealer and locking C-shaped spring clips
• EMI/RFI Suppression: Integrated magnetic core for noise-free electronics operation
• Limited Lifetime Warranty included

Fits select 2000-2005 Buick, Chevrolet, Oldsmobile, and Pontiac models including Century, Impala, Grand Am, and Montana.

The NGK 51021 Spark Plug Wire Set is engineered to provide maximum conductivity while maintaining excellent EMI/RFI noise suppression. These ultra-low resistance mag core wires utilize a premium ferrite magnetic core wrapped in stainless steel winding to deliver a more powerful spark to the combustion chamber. To withstand the harsh environment of the engine bay, each wire is protected by a high-temp silicone outer jacket and inner EPDM/silicone insulation, providing superior dielectric strength against high voltage leaks.

• Mag Core Construction: Ferrite magnetic core with stainless steel winding for low resistance and high-energy delivery.
• Heat Protection: Premium silicone outer jacket rated for high engine temperatures.
• Watertight Seal: Spark plug boots are factory-glued with a silicone sealer to exclude moisture and prevent arcing.
• Secure Retention: Stainless steel terminals feature up to three serrated crimps for high retention strength, paired with a corrosion-resistant C-shaped spring clip for a positive connection.
• Interference Suppression: Integrated suppression layers prevent electrical noise from affecting onboard electronics.
• Manufacturer Part Number: 51021

Fits select 1998-2007 Chevrolet, GMC, Isuzu, and Oldsmobile models, including Astro, Blazer, S10, Sierra, Savana, and Safari.

The NGK 51003 spark plug wire set is engineered to provide maximum conductivity and durability for GM-based ignition systems. Utilizing an ultra-low resistance ferrite magnetic core, these wires deliver a more powerful spark for efficient combustion while providing superior EMI/RFI noise suppression for onboard electronics. The construction features a high-temperature silicone outer jacket and EPDM/silicone inner insulation to maintain high dielectric strength and resist chemical degradation in the engine bay.

Designed for a precision fit, the spark plug boots are glued with a silicone sealer to ensure a watertight seal. Stainless steel terminals with up to three serrated crimps bite into the jacket for high retention strength, while the locking C-shaped spring clip ensures a positive connection to the spark plug tip.

• Manufacturer Part Number: 51003
• Core Construction: Stainless steel winding over ferrite magnetic core
• Jacket Material: High-temperature premium silicone
• Insulation: Inner EPDM/silicone layers for maximum voltage containment
• Terminal Type: Stainless steel with triple-serrated crimps
• Boot Design: Watertight glued silicone sealer
• Connection: Corrosion-resistant locking C-shaped spring clip
• Warranty: Limited Lifetime Warranty

Fits 2004-2008 Mazda RX-8 (Base, 40th Anniversary Edition, Grand Touring, Shinka, Sport, and Touring models).

NGK spark plug wire sets are engineered to meet or exceed original equipment specifications, providing exceptional electrical conductivity and superior EMI/RFI noise suppression. These variable pitch magnetic core cables produce the necessary impedance to suppress interference across the entire frequency spectrum, ensuring clean ignition performance without disrupting sensitive onboard electronics.

Built for the harsh environment of the RX-8 rotary engine bay, these wires feature a dual-layer outer jacket of EPDM and silicone for high-voltage containment and maximum dielectric strength. Every boot is bonded to the cable using a specialized silicone sealer to create a watertight seal, preventing moisture intrusion and terminal corrosion.

• Precision Terminals: Corrosion-resistant, stainless steel terminals utilize up to three serrated crimps for maximum retention strength.
• Secure Connection: Locking C-shaped spring clips ensure a positive, vibration-resistant connection to the spark plug.
• Superior Insulation: Silicone/EPDM jacket provides high-heat resistance and electrical insulation.
• Noise Suppression: Variable pitch resistor design eliminates radio frequency interference.
• Manufacturer Part Number: 4858
• Warranty: Limited Lifetime Warranty

Designed for Ford 289, 302, and 351W Small Block engines equipped with an HEI-style distributor cap, this Moroso Ultra 40 Spark Plug Wire Set delivers high-performance ignition reliability. These 8.5mm wires are engineered to provide maximum conductivity while maintaining excellent EMI/RFI suppression for clean signal delivery.

The Ultra 40 series is built for durability in demanding engine environments. The multi-angle spark plug boots offer essential flexibility, allowing you to route wires safely away from hot exhaust manifolds or headers. Finished in a clean black jacket, this set provides a professional look under the hood while ensuring your Ford V8 receives consistent spark energy.

• Fits Ford 289, 302, and 351W Small Block engines
• 8.5mm wire diameter with Ultra 40 high-performance core
• Designed for HEI-style (male terminal) distributor caps
• Multi-angle spark plug boots for improved clearance and routing
• High-temperature silicone jackets in a black finish
• Manufacturer Part Number: 73765

The Moroso Ultra 40 8mm Spark Plug Wire Set (MPN 73764) is a high-performance ignition solution designed for custom-tailored installations. These 8mm wires feature a durable red silicone jacket engineered for superior heat resistance and dielectric strength in demanding engine bays.

This universal set includes multi-angle spark plug boots, providing the clearance necessary to navigate around headers and complex engine layouts. To ensure broad compatibility across various ignition systems, the kit includes terminals and boots for both HEI and Non-HEI (socket-style) distributor caps.

• Wire Diameter: 8mm
• Wire Color: Red
• Boot Type: Multi-Angle Spark Plug Boots
• Distributor Cap Style: Universal HEI and Non-HEI (Socket)
• Configuration: Universal wire set for custom length fitment
• Manufacturer Part Number: 73764

Ensure maximum ignition energy reaches your cylinders with the Moroso Ultra 40 8mm Spark Plug Wire Set. Engineered for high-performance applications, these universal cut-to-fit wires feature a spiral core designed to deliver consistent spark while providing superior EMI/RFI suppression. The 8mm diameter high-temperature silicone jacket protects against heat soak and engine fluids.

• Universal Fitment: Includes terminals and boots for both HEI and Non-HEI (socket style) distributor caps to suit various ignition setups.
• Multi-Angle Boots: Spark plug boots can be adjusted to provide necessary clearance around headers, exhaust manifolds, and engine components.
• High-Performance Lead: 8mm wire diameter with a durable black finish for a professional, stealthy engine bay look.
• Custom Lengths: Designed as a universal set, allowing you to cut and crimp wires to the exact length required for your specific engine configuration.
• Manufacturer Part Number: 73763

Fits GM Big Block Chevy (BBC) 366-454 engines equipped with HEI-style distributors (without coil-in-cap).

The Moroso Ultra 40 8.5mm Spark Plug Wire Set is engineered for high-performance applications where heat management and ignition reliability are critical. Featuring a spiral-wound conductor, these wires deliver maximum energy to the plugs while providing superior RFI/EMI suppression to protect sensitive vehicle electronics. The multi-angle spark plug boots offer versatile positioning, making them ideal for navigating tight clearances around exhaust headers.

• 8.5mm wire diameter with high-dielectric strength insulation
• Ultra 40 series construction for optimized conductivity and durability
• Multi-angle plug boots for custom-fit clearance around headers
• Designed for HEI-style terminals (external coil applications)
• Classic black jacket finish
• Manufacturer Part Number: 73761

Fits GM Big Block Chevy (BBC) 366-454 engines equipped with HEI-style coil-in-cap distributors.

The Moroso Ultra 40 Spark Plug Wire Set is engineered to deliver maximum spark energy with high-performance RFI and EMI suppression. These 8.5mm wires feature a multi-angle boot design that provides the versatility needed for custom routing and header clearance in tight engine bays. Built for durability and consistent ignition, this set replaces worn factory leads with high-temperature, low-resistance wires designed for big block applications.

• Part Number: 73759
• Series: Ultra 40
• Wire Diameter: 8.5mm
• Terminal Style: HEI-Style (Coil-In-Cap)
• Plug Boot Angle: Multi-Angle
• Wire Color: Black

Fits select 1999-2013 GM vehicles with LS and LQ series engines (6.2L).

Moroso Ultra 40 Spark Plug Wire Sets are engineered for high-performance applications where heat management and EMI/RFI suppression are critical. These 8.5mm wires feature a durable, high-temperature silicone jacket designed to resist engine bay chemicals and extreme heat. The multi-angle boots provide versatile installation options, ensuring a secure, reliable connection to the spark plugs even in tight engine configurations.

• Manufacturer Part Number: 73758
• Series: Ultra 40
• Wire Diameter: 8.5mm
• Color: Red
• Boot Style: Multi-Angle
• Application: GM LS/LQ engines (1999-2013)
• Engine Compatibility: (6.2L)

Fits 1999-2013 GM LS and LQ-based engines (4.8L, 5.3L, 5.7L, 6.0L, and 6.2L).

The Moroso Ultra 40 series is engineered for high-performance applications where maximum spark energy and superior EMI/RFI suppression are required. These 8.5mm spark plug wires feature a high-conductivity core designed to handle high-output ignition systems while protecting sensitive vehicle electronics from interference. The multi-angle boots provide the flexibility needed to navigate around exhaust headers and tight engine bay clearances, making them a staple for LS engine builders.

• 8.5mm wire diameter for maximum voltage carrying capacity
• Multi-angle boots facilitate easy installation around various header configurations
• Designed specifically for the GM LS/LQ engine architecture
• Durable black wire jacket for a clean, professional appearance
• Manufacturer Part Number: 73757

Fits GM LS-based engines including 5.7L, 6.0L, 6.2L, and 7.0L displacements.

The Moroso Ultra 40 8.5mm Ignition Spark Plug Wire Set is engineered for high-performance GM LS applications where heat management and ignition signal integrity are critical. These wires feature a multi-angle boot design, allowing for the necessary clearance around exhaust headers and steering shafts while maintaining a secure, vibration-resistant connection to the spark plug. The 8.5mm wire diameter provides heavy-duty insulation to protect against voltage leaks and high under-hood temperatures.

• Series: Ultra 40
• Wire Diameter: 8.5mm
• Boot Style: Multi-Angle
• Wire Color: Red
• Manufacturer Part Number: 73756
• Provides excellent EMI/RFI suppression for clean electronics operation
• High-temperature silicone jackets for durability in performance environments

Fits GM LS engines (5.7L, 6.0L, 6.2L, and 7.0L).

Moroso Ultra40 ignition wires are engineered for high-performance applications where maximum spark energy and superior EMI/RFI suppression are critical. This 8.5mm wire set features a highly conductive core that ensures consistent delivery to the spark plugs, even under extreme combustion pressures. The multi-angle boots provide the flexibility needed to clear headers or tight engine bay constraints, making them an ideal choice for modified LS powerplants.

• Manufacturer Part Number: 73755
• Wire Diameter: 8.5mm
• Series: Ultra40 Race Wire
• Boot Style: Multi-Angle for versatile clearance
• Color: Black
• Designed for GM LS-series engines (5.7L, 6.0L, 6.2L, 7.0L)
• Optimized for maximum energy transfer and noise suppression

Fits GM Gen V LT1 and LT4 engines (5.3L / 6.2L / 6.6L).

The Moroso Ultra 40 Spark Plug Wire Set (MPN: 73754) is designed for high-performance applications where EMI/RFI suppression and heat resistance are critical. These 8.5mm wires feature a wire-wound core that delivers maximum spark energy to the plugs while maintaining low resistance. The high-dielectric silicone jacket is built to withstand extreme under-hood temperatures, and the multi-angle boots provide the necessary clearance for custom routing around headers and engine components.

• Series: Ultra 40
• Diameter: 8.5mm
• Boot Type: Multi-Angle
• Color: Red
• Manufacturer Part Number: 73754
• Core: High-performance wire-wound with superior suppression
• Insulation: High-temperature silicone

Fits select GM Gen V LT1 and LT4 engines (5.3L / 6.2L / 6.6L).

The Moroso Ultra 40 Spark Plug Wire Set is engineered for high-performance GM Gen V applications where heat management and EMI suppression are critical. These 8.5mm wires feature a multi-angle boot design, allowing for precise clearance around exhaust headers and tight engine bay configurations. This flexibility ensures a secure, high-conductivity connection for consistent ignition performance under demanding conditions.

• Series: Ultra 40
• Wire Diameter: 8.5mm
• Boot Style: Multi-Angle
• Color: Black
• Application: GM Gen V LT-series engines
• Manufacturer Part Number: 73753

Fits Ford 289, 302, and 351W small block engines equipped with an HEI-style distributor cap.

The Moroso Ultra 350 Spark Plug Wire Set (MPN 52047) is engineered for performance and reliability in Small Block Ford applications. These 8mm diameter wires feature a high-temperature silicone jacket that protects against engine bay heat and prevents voltage leaks. The set is finished in a vibrant red and includes multi-angle boots, which allow for easier installation and clearance adjustments around exhaust headers and tight engine compartments.

Designed with HEI-style (male) terminals for the distributor cap, these wires ensure a secure connection and consistent spark delivery. The Ultra 350 series provides excellent RFI suppression, making them suitable for both street and track use while protecting sensitive electronic ignition components.

• Manufacturer Part Number: 52047
• Wire Diameter: 8mm
• Color: Red
• Distributor Cap Style: HEI (Male)
• Spark Plug Boot Style: Multi-Angle
• Compatible Engines: Ford 289, 302, 351W

The Moroso Ultra 350 series spark plug wire set (MPN 52046) provides a high-performance ignition solution for universal engine applications. These 8mm wires are engineered to deliver consistent spark energy while maintaining excellent interference suppression for street and performance builds.

This universal set is designed for maximum versatility, including both HEI and non-HEI style distributor caps to accommodate various ignition system configurations. The multi-angle boots provide the flexibility needed to route wires safely away from hot exhaust headers and tight engine bay obstacles.

• Product Line: Ultra 350
• Wire Diameter: 8mm
• Color: Red
• Boot Style: Multi-angle for flexible installation
• Cap Style: Includes HEI and Non-HEI terminals/boots
• Manufacturer Part Number: 52046

Fits GM Big Block Chevy (BBC) 366, 396, 402, 427, and 454 engines equipped with HEI-style distributors (without coil-in-cap).

The Moroso Ultra 350 Spark Plug Wire Set is engineered for high-performance street and racing applications where ignition reliability is critical. These 8mm wires feature a high-dielectric silicone jacket that resists heat, oil, and chemicals, ensuring consistent voltage delivery to the plugs. The multi-angle boots provide the necessary flexibility to clear exhaust headers and tight engine bay clearances, solving common routing issues on Big Block platforms. This set is designed specifically for external coil HEI setups, providing a secure, snap-lock fit at the distributor cap.

• 8mm wire diameter with a durable red silicone insulation jacket
• Multi-angle spark plug boots for optimized routing and header clearance
• Compatible with HEI-style distributor terminals (external coil applications)
• Pre-terminated for straightforward installation on GM Big Block V8 engines
• Manufacturer Part Number: 52039

Designed for Big Block Chevy engines (366-454) equipped with HEI-style coil-in-cap distributors, this Moroso Ultra 350 8mm Spark Plug Wire Set delivers reliable ignition performance for street and strip applications. The 8mm diameter wires feature a high-temperature silicone jacket that provides superior protection against heat soak and engine fluids while maintaining excellent dielectric strength.

• Fits GM Big Block Chevy (BBC) 366, 396, 402, 427, and 454 engines
• Engineered for HEI-style ignition systems with coil-in-cap distributors
• 8mm diameter wire with high-temperature red silicone insulation
• Multi-angle spark plug boots provide flexibility to clear headers and exhaust manifolds
• Optimized for low resistance and high-voltage delivery
• Manufacturer Part Number: 52038

Fits select 1999-2013 GM vehicles equipped with LS and LQ series engines (6.2L).

The Moroso Ultra 350 Spark Plug Wire Set is engineered for high-performance ignition on late-model GM LS-based engines. These 8mm wires feature a spiral core design that provides excellent RFI suppression and high conductivity, ensuring maximum spark energy reaches your plugs even in high-heat environments. The multi-angle boots allow for adjustable positioning to provide essential clearance around exhaust headers and tight engine bay components.

• Manufacturer Part Number: 52037
• 8mm diameter wire with durable red silicone jackets
• Multi-angle plug boots for versatile routing and header clearance
• Optimized for high-output LS and LQ series ignition systems
• Full set of 8 spark plug wires

Fits 1997-2013 Chevrolet Corvette models (5.7L / 6.0L / 6.2L).

The Moroso Ultra 350 series 8mm Spark Plug Wire Set is engineered to deliver consistent ignition performance for LS-based Corvette powerplants. These wires are constructed with a high-temperature red silicone outer jacket designed to withstand the intense heat, oil, and chemical exposure common in high-performance engine bays. The multi-angle boots allow for adjustable positioning, providing essential clearance around exhaust headers and steering components for a clean, professional installation.

• Wire Diameter: 8mm
• Series: Ultra 350
• Boot Type: Multi-Angle for versatile fitment
• Color: Red silicone jacket
• Manufacturer Part Number: 52036