The BLOX Racing Fuel Injector Harness Adapters provide a reliable, plug-and-play solution for integrating Bosch-style injectors into a vehicle equipped with an OBD1 wiring harness. This set allows for a clean, professional installation without the need to cut or solder factory wiring, preserving the electrical integrity of your engine harness.

• Converts factory OBD1 harness connectors to Bosch-style injector clips
• Full set of 4 adapters for 4-cylinder fuel rail applications
• Direct plug-and-play design avoids splicing and wire degradation
• Precision-molded connectors with secure locking tabs for vibration resistance
• High-quality insulated wiring handles engine bay temperatures and ensures consistent signal delivery

Fits 2017-2024 Ford F-250 and F-350 Super Duty (6.7L Powerstroke).

The factory plastic injector return connector on the 6.7L Powerstroke is prone to failure, often becoming brittle and breaking due to engine heat, vibration, or routine fuel filter maintenance. Fleece Performance engineered this heavy-duty repair fitting from billet aluminum to eliminate the risk of being stranded by a broken, non-serviceable fuel line.

This 5-pack kit is designed for fleet maintenance and service shops. Each fitting features a dual O-ring internal design for a superior seal and a serviceable barb fitting. The kit is compatible with both OEM and aftermarket under-hood fuel filter assemblies, including Fleece Performance P/N FPE-FMC-UHFA-1123.

• Replaces brittle plastic factory injector return connectors
• Constructed from CNC-machined billet aluminum for durability
• Dual O-ring internal design ensures leak-free performance
• Serviceable billet aluminum barb fitting
• Includes 5 injector return fittings (FPE-FMC-FF-RLK-1724)
• Includes 1 fitting service kit (FPE-FMC-FF-RLK-1724-SER) with replacement O-rings and locking tabs
• MPN: FPE-FMC-FF-RLK-1724-5P

Fits 2004-2005 Chevrolet Silverado and GMC Sierra 2500 HD/3500 models equipped with the 6.6L Duramax engine.

The Fleece Performance High Pressure Injection Line Kit (FPE-FL-DMAX-LLY-SET) is a comprehensive solution for replacing worn, cracked, or leaking fuel lines on your LLY Duramax. High-pressure fuel lines are critical components of the common rail system; over time, vibration and thermal cycling can cause factory lines to fatigue or develop leaks at the flared ends. This kit provides a direct-fit replacement to restore fuel system integrity and prevent performance loss or engine bay hazards.

Precision-engineered to meet factory tolerances, these lines ensure a secure, high-pressure seal between the fuel rail and the injectors. As a complete set of eight, this kit allows for a total refresh of the high-pressure side of the injection system, making it an ideal choice during an injector replacement or engine overhaul.

• Complete set of 8 high-pressure fuel lines
• Direct-fit replacement for factory hardware
• Corrosion-resistant finish for long-term durability
• Manufacturer Part Number: FPE-FL-DMAX-LLY-SET
• Replaces GM Part Numbers: 97378825 (x2), 97378828 (x2), 97378826 (x2), 97378827 (x2)

Fits select 2017-2022 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD models equipped with the 6.6L L5P Duramax engine.

A common failure point on the L5P Duramax, these fuel injector connector pigtails address the increased resistance issues that often trigger injector Diagnostic Trouble Codes (DTCs) P0201 through P0208. These connectors are prone to wear over time and are typically recommended for replacement whenever injectors are serviced to ensure a reliable electrical connection and prevent future diagnostic issues.

Each connector is produced in-house using fully automated wire cutting and terminal crimping processes for precise tolerances and long-term durability. This kit includes four pigtails with 4.5-inch leads and heat-sealable butt-style connectors for a secure, weather-resistant installation.

• Direct replacement for GM part number 19368140
• 4.5-inch pigtail leads
• Automated wire cutting and crimping
• Includes heat-sealable butt-style connectors
• Sold as a set of 4
• Manufacturer Part Number: FPE-HAR-L5P-INJ-PT-4P

Fits 2017-2022 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L L5P Duramax engine.

This Fleece Performance replacement fuel injector connector is engineered to solve a common failure point on the L5P Duramax. These connectors are prone to increased electrical resistance over time, which frequently triggers injector-related diagnostic trouble codes (DTCs) P0201 through P0208. This pigtail allows for a reliable repair during injector replacement or when troubleshooting harness-side connectivity issues.

• 4.5-inch pigtail for flexible installation and splicing
• Includes two heat-sealable butt-style connectors for a secure, weather-resistant connection
• Helps eliminate resistance-induced DTCs (P0201-P0208)
• Replaces GM part number: 19368140
• Manufacturer Part Number: FPE-HAR-L5P-INJ-PT

Fits select 2017-2024 Ford F-250 and F-350 Super Duty (6.7L Powerstroke).

The factory plastic injector return connector on the 2017-2024 6.7L Powerstroke is highly susceptible to heat soak and vibration, often failing or breaking during routine fuel filter maintenance. The Fleece Performance injector return line repair fitting (P/N: FPE-FMC-FF-RLK-1724) replaces that fragile component with a heavy-duty, machined billet aluminum housing designed for longevity.

This upgrade features a dual O-ring internal design for a superior seal and includes a serviceable billet aluminum barb fitting. It is a direct fit for both OEM and aftermarket under-hood fuel filter assemblies, such as Fleece P/N: FPE-FMC-UHFA-1123, ensuring your fuel system remains secure and leak-free through years of service.

• Precision machined billet aluminum housing replaces fragile plastic factory units
• Dual O-ring internal seal for enhanced leak protection
• Serviceable billet aluminum barb fitting for long-term maintenance
• Easy to install and remove during routine filter changes
• Designed for use with OEM and aftermarket filter assemblies
• Manufacturer Part Number: FPE-FMC-FF-RLK-1724

Fits 2011-2016 Ford F-250 and F-350 Super Duty trucks (6.7L).

The plastic factory injector return fitting on the 6.7L Powerstroke is a known failure point, susceptible to cracking from engine heat, vibration, and the stresses of fuel filter maintenance. The Fleece Performance injector return line repair fitting replaces this fragile component with a heavy-duty billet aluminum housing, preventing leaks and ensuring you aren't stranded by a non-repairable fuel line.

This fitting features a dual O-ring internal design for a superior seal and includes a serviceable billet aluminum barb fitting. It is fully compatible with OEM fuel filter assemblies as well as the Fleece Performance under-hood fuel filter assembly (P/N: FPE-FMC-UHFA-1123). This kit provides a durable, long-term solution for maintaining your fuel system's integrity.

• Manufacturer Part Number: FPE-FMC-FF-RLK-1116
• Material: Heavy-duty machined billet aluminum housing
• Sealing: Internal dual O-ring design for increased sealing reliability
• Features: Serviceable billet aluminum barb fitting
• Includes: Injector return fitting with locking tab and O-rings
• Compatibility: Works with OEM and Fleece P/N: FPE-FMC-UHFA-1123 filter assemblies

Fits 2011-2016 Chevrolet Silverado and GMC Sierra 2500/3500 HD (6.6L Duramax LML).

This Fleece Performance replacement high-pressure fuel line is engineered specifically for 6.6L LML Duramax engines equipped with CP3 conversion kits. It provides a reliable, direct-fit solution for maintaining the critical high-pressure connection between the fuel pump and the rail, ensuring consistent fuel delivery in high-performance diesel applications.

As a service component for existing CP3 setups, this line is a direct replacement for the hardware found in several Fleece Performance conversion systems. It is built to the same strict tolerances as the original kit components to handle the high-stress demands of the common rail system without leaks or vibration fatigue.

• Manufacturer Part Number: FPE-FL-LML-CP3-HP
• Application: Designed for 6.6L LML Duramax CP3 conversions.
• Compatibility: Replaces the high-pressure line originally included in Fleece kit part numbers FPE-LML-CP3-NP, FPE-LML-CP3-WP, and FPE-LML-CP3-FF-10.
• Construction: High-tensile fuel line with precise bends for factory-style routing.

Vehicle Fitment

Fits select 2006-2010 Chevrolet Silverado and GMC Sierra 2500 HD/3500 and 2500/3500 Classic models (6.6L Duramax LBZ / LMM).

High-pressure fuel lines on the Duramax LBZ and LMM engines are subject to extreme heat cycles and vibration, which can lead to corrosion, stress cracking, and dangerous fuel leaks. The Fleece Performance High Pressure Injection Line Kit offers a comprehensive 8-piece solution to restore your fuel system's integrity. These lines are precision-engineered as direct-fit replacements for the factory components, ensuring a secure seal between the common rail and the fuel injectors without the need for modification.

• Complete set includes all 8 high-pressure lines required for a full engine service
• Direct replacement for cracked, corroded, or leaking factory injector lines
• Engineered for precise fitment and factory-level sealing tolerances
• Essential for maintaining consistent fuel rail pressure and preventing engine bay fires
• Manufacturer Part Number: FPE-FL-DMAX-LBZLMM-SET

Replaces the following GM OE Part Numbers:

• 98006523 (Qty 2)
• 98006527 (Qty 2)
• 98006524 (Qty 2)
• 98006526 (Qty 2)

Fits select 2007-2018 Dodge and Ram 2500/3500 trucks (6.7L Cummins).

Restore the integrity of your common rail fuel system with this complete high-pressure fuel injection line set from Fleece Performance. Over time, factory lines can become brittle, develop micro-cracks, or leak at the fittings due to vibration and heat cycles. These Fleece Performance lines are designed as direct-fit replacements for the original equipment, ensuring a leak-free seal and proper fuel delivery to your injectors.

• Direct replacement for cracked, corroded, or leaking high-pressure lines
• Precision-bent for exact fitment within the 6.7L engine bay
• Complete six-line set covers all cylinders
• Manufacturer Part Number: FPE-FL-CUMM-6.7-SET

Kit Contents:

• (1) Cylinder 1 Line: FPE-FL-CUMM-6.7-1
• (2) Cylinder 2 & 3 Lines: FPE-FL-CUMM-6.7-23
• (2) Cylinder 4 & 5 Lines: FPE-FL-CUMM-6.7-45
• (1) Cylinder 6 Line: FPE-FL-CUMM-6.7-6

Fits 2001-2004 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 trucks equipped with the LB7 engine.

Fleece Performance high-pressure injection lines are a critical replacement for maintaining fuel system health in your 2001-2004 LB7 engine. Over time, factory lines are prone to internal and external corrosion, which often leads to failure or breakage. Reusing old, corroded lines during an injector service is a leading cause of debris contamination that can ruin newly installed injectors. These brand-new lines ensure a clean, reliable fuel path from the rail to the injector, protecting your investment and ensuring proper engine performance.

• Complete set of 8 injection lines for a full engine bank replacement
• Brand-new construction with no core charge required
• Direct-fit replacement for corroded or failing factory lines
• Essential for preventing contamination during injector swaps
• Manufacturer Part Number: FPE-34611

This individual electrical terminal from Injector Dynamics is designed specifically for USCAR-style fuel injector connectors. It is an essential component for technicians and enthusiasts building custom EFI wiring harnesses or performing precision repairs on existing fuel injector leads.

• Compatible with USCAR and EV6-style injector connector housings
• High-conductivity metallic construction ensures a reliable electrical connection
• Ideal for custom harness fabrication and pin replacements
• Sold individually to meet specific project requirements
• Manufacturer Part Number: USCAR TERMINAL

The Injector Dynamics Universal USCAR Fuel Injector Female Connector Kit (Pigtail) provides a reliable, secure electrical interface for USCAR-style fuel injectors. This pigtail kit is designed for universal applications, allowing for seamless hard-wiring into an existing engine harness when upgrading to EV6 or EV14 style injectors or replacing damaged factory plugs.

• Fits USCAR (EV6/EV14) style female fuel injector terminals
• Includes pre-terminated wire pigtails for direct splicing and integration
• High-quality insulation designed to withstand the heat and chemical exposure of the engine bay
• Ensures consistent electrical contact for precise injector performance
• Manufacturer Part Number: 94.0

This Injector Dynamics connector kit provides the professional-grade components required to build or repair wiring harnesses for Denso-style fuel injectors. Designed to withstand the high-heat and high-vibration environment of an engine bay, these connectors ensure a stable, weather-sealed electrical interface for consistent injector performance.

• Compatible with Denso-style female fuel injector plugs
• Includes high-quality terminal pins and connector housing
• Engineered for secure, positive-locking engagement
• Ideal for custom harness construction or OE connector replacement
• Manufacturer Part Number: 93.1

The Injector Dynamics Universal USCAR Fuel Injector Female Connector Kit (MPN 93.0) provides a reliable, secure electrical connection for USCAR-style fuel injectors. This kit is an essential component for technicians and enthusiasts building custom EFI wiring harnesses or performing high-standard repairs on existing vehicle fuel systems.

Engineered to ensure a precise fit, these female connectors provide consistent signal delivery to your fuel injectors, helping to prevent the intermittent connectivity issues or misfires often associated with worn or brittle OE plugs. The kit includes the connector housing and the necessary terminals for a professional-grade termination.

• Connector Type: USCAR (Female)
• Application: Universal fuel injector wiring
• Manufacturer Part Number: 93.0
• Installation: Requires proper crimping tools for terminal installation

The Injector Dynamics Denso to USCAR Plug-and-Play (PnP) Adapter (MPN: 90.7) provides a seamless electrical connection between a factory Denso-style harness and modern USCAR-style fuel injectors. This adapter is a critical component for enthusiasts upgrading to high-performance injectors who want to avoid the risks associated with cutting, stripping, or soldering factory wiring.

• Direct Adaptation: Specifically designed to bridge the gap between Denso-style harness connectors and USCAR-style injector terminals.
• Plug-and-Play Convenience: Allows for a completely reversible installation that preserves the integrity of the vehicle's original electrical system.
• Durable Construction: Built to withstand the harsh thermal environment of the engine bay while maintaining consistent electrical conductivity.
• Manufacturer Part Number: 90.7

This adapter ensures a secure, weatherproof connection, making it the preferred choice for installing Injector Dynamics ID850, ID1050x, or other USCAR-based injectors into vehicles originally equipped with Denso electrical connectors.

The Injector Dynamics Denso to EV1 Plug-and-Play (PnP) Adapter (Part #90.5) provides a seamless, solder-free connection between your vehicle's wiring harness and performance fuel injectors. This adapter is designed to bridge the gap between an EV1-style (Jetronic/Minitimer) harness connector and a Denso-style injector lug, eliminating the need for cutting, stripping, or crimping factory wiring during a fuel system upgrade.

Built to withstand the heat and vibration of high-performance engine bays, these adapters ensure a secure, weather-sealed electrical connection for consistent injector pulse delivery. These are an essential component for owners installing Injector Dynamics or other Denso-bodied injectors into vehicles equipped with EV1 harness plugs.

• Direct plug-and-play installation; no permanent harness modifications required
• Adapts EV1 (Jetronic/Minitimer) harness connectors to Denso-style injectors
• Durable plastic housing with secure locking tabs for a vibration-resistant fit
• Manufacturer Part Number: 90.5

The Injector Dynamics USCAR to Denso Plug-and-Play (PnP) Adapter (90.3) enables a clean, reliable electrical connection between a USCAR-style (EV6/EV14) vehicle harness and Denso-style fuel injectors. Designed for enthusiasts and technicians performing fuel system upgrades, this adapter eliminates the need for invasive wire cutting, crimping, or soldering, preserving the integrity of the factory engine loom.

• Direct plug-and-play installation for a secure, weather-sealed connection
• High-quality automotive-grade connectors and terminals
• Ensures proper electrical continuity for precise injector firing
• Manufacturer Part Number: 90.3
• Cross-reference compatibility: id91.3, id90.4, and dwconn-US-SUM

The Injector Dynamics USCAR to OBD2 PnP Adapter (MPN 90.2) provides a seamless, plug-and-play solution for adapting fuel injectors with USCAR connectors to vehicles equipped with factory OBD2-style (Denso/Sumitomo) wiring harnesses. This adapter eliminates the risk and hassle of cutting, stripping, or soldering your vehicle's original electrical harness, ensuring a secure and reversible installation.

• Direct Adaptation: Bridges the gap between USCAR injector terminals and OBD2-style harness plugs.
• Plug-and-Play Installation: Designed for an immediate mechanical and electrical connection with no specialized tools required.
• Reliable Conductivity: Features high-quality terminals and secure locking tabs to resist vibration and maintain signal integrity.
• Technical Cross-Reference: Functionally equivalent to part number dwconn-US-HON.
• Manufacturer Part Number: 90.2

Fits select 2012+ Honda models.

The Injector Dynamics (90.11) USCAR to 2012+ Honda Adapter provides a clean, professional solution for connecting high-performance fuel injectors to your vehicle's factory wiring harness. This plug-and-play adapter eliminates the need for cutting or soldering your OE harness, ensuring a reliable electrical connection and maintaining the integrity of your fuel system's signal.

• Manufacturer Part Number: 90.11
• Converts USCAR (EV6/EV14 style) injectors to 2012+ Honda factory harness connectors
• Direct-fit design for a seamless, secure connection
• Durable housing and high-quality terminals for long-term reliability in high-heat engine environments

The Injector Dynamics USCAR to EV1 Plug-and-Play (PnP) Adapter provides a secure, reliable electrical connection when installing fuel injectors with EV1-style connectors into vehicles equipped with USCAR (EV6) factory wiring harnesses. This adapter eliminates the need for cutting, stripping, or soldering your OE harness, maintaining the integrity of your vehicle's electrical system while allowing for a completely reversible installation.

• Direct Adaptation: Bridges the gap between USCAR harness connectors and EV1 injector terminals.
• Plug-and-Play Convenience: Simplifies fuel system upgrades with a tool-free installation process.
• Durable Construction: Engineered to withstand the heat and vibration of high-performance engine bays.
• Exact Fitment: Designed by Injector Dynamics for a precise, clip-in interface that prevents accidental disconnection.
• Part Number: 90.1

The DeatschWerks CONN-USCARX is an essential solution for technicians and builders needing to repair, modify, or create custom fuel injector harnesses. This USCAR-style (often referred to as EV6 or EV14 style) electrical connector housing provides a secure, weather-sealed interface for modern EFI systems, ensuring consistent electrical contact and signal integrity.

Designed for durability in the high-heat environment of an engine bay, this kit allows for professional-grade re-pinning. Whether you are replacing a brittle factory connector or pinning out a completely new wiring loom for high-performance injectors, these components provide the precise tolerances required for reliable operation.

• Standard USCAR electrical interface compatible with EV6 and EV14 injectors
• Includes durable connector housing and metal terminal pins
• Engineered for re-pinning damaged leads or custom harness construction
• Maintains secure, low-resistance connections for fuel system components
• Manufacturer Part Number: CONN-USCARX

The DeatschWerks CONN-US-SUM adapter provides a reliable, plug-and-play (PnP) solution for integrating Denso (Sumitomo) style fuel injectors into a vehicle equipped with a USCAR (EV6/EV14) wiring harness. This adapter, also identified by the industry reference id90.3, allows for immediate installation without the need for cutting, stripping, or soldering the factory electrical system, ensuring the modification is completely reversible.

• Interface: Adapts USCAR female vehicle harness connectors to Denso (Sumitomo) male injector terminals.
• Installation: Full plug-and-play design requires no specialized tools or wiring modifications.
• Reliability: Constructed with high-quality, heat-resistant connectors and secure locking tabs for a dependable electrical connection under high-vibration engine bay conditions.
• Manufacturer Part Number: CONN-US-SUM
• Equivalent Part Reference: id90.3

Simplify your fuel system upgrade with DeatschWerks USCAR to Jetronic fuel injector adapter clips. These high-quality electrical pigtails allow for a seamless, plug-and-play connection when installing injectors with USCAR (EV6/EV14) style connectors onto an engine harness equipped with Jetronic (EV1/Minitimer) plugs.

Designed for reliability in high-performance environments, these adapters eliminate the need for cutting, splicing, or soldering your factory wiring. By maintaining a secure electrical connection, they ensure consistent signal delivery to your injectors, which is critical for precise fuel metering and engine tuning. Whether you are upgrading to modern high-flow injectors or performing an engine swap, these adapters provide a professional-grade solution.

• Manufacturer Part Number: CONN-US-JT
• Connector Type A: USCAR (Fits EV6 and EV14 injectors)
• Connector Type B: Jetronic (Fits EV1 and Minitimer harnesses)
• Design: Pre-assembled pigtail for easy installation
• Application: Ideal for converting older harnesses to modern injector standards

Simplify your fuel system upgrade with the DeatschWerks CONN-US-HON plug-and-play fuel injector adapter. This technical solution allows you to bridge the gap between high-performance injectors featuring USCAR (EV6/EV14 style) connectors and your vehicle's factory Honda OBD2 or K-Series wiring harness. By using a dedicated adapter, you maintain the integrity of your engine loom, avoiding the need for cutting, crimping, or soldering during installation.

• Interface: USCAR (Female) to Honda OBD2/K-Series (Male) connector.
• Seamless Integration: Engineered for a secure, clip-in fit that resists vibration and ensures a stable electrical connection.
• Reliability: Constructed with high-quality terminals and weather-sealed housings to withstand engine bay heat and fluids.
• Compatibility: Functionally equivalent to part number id90.2; ideal for K-series swaps or OBD2 Honda builds using modern USCAR injectors.
• Manufacturer Part Number: CONN-US-HON

The DeatschWerks CONN-SUMX is a professional-grade Sumitomo-style electrical connector housing designed for precise re-pinning of automotive fuel system components. Whether you are repairing a damaged factory harness or building a custom wiring solution for high-performance fuel pumps or injectors, this kit ensures a secure, low-resistance connection that can withstand the demands of high-flow fuel systems.

• Sumitomo-style connector architecture for reliable fitment
• Includes durable connector housing and precision terminal pins
• Ideal for custom harness builds or OE harness repair
• Engineered for use with DeatschWerks fuel system components
• Manufacturer Part Number: CONN-SUMX

The DeatschWerks Nissan Side Feed Fuel Injector Connector Clips are engineered to provide a secure and reliable electrical connection for Nissan fuel systems. These high-quality clips (MPN: CONN-NSF) are essential for replacing brittle, heat-damaged factory connectors or for integrating new injectors into a custom wiring harness.

• Designed specifically for Nissan side-feed fuel injector applications
• Constructed from durable materials to withstand engine bay heat and chemicals
• Positive-locking design ensures a stable connection under vibration
• Ideal for harness repairs or aftermarket fuel system upgrades
• Manufacturer Part Number: CONN-NSF

Fits select 2012 and newer Honda models.

The DeatschWerks CONN-JT-HON2W wired adapters provide a reliable, plug-and-play solution for installing injectors with Jetronic, EVI, or Minitimer connectors into a 2012+ Honda factory harness. These pre-wired clips eliminate the need for cutting or soldering your OE wiring, ensuring a secure electrical connection and allowing for an easy return to stock if necessary.

• Manufacturer Part Number: CONN-JT-HON2W
• Connector Type A: Jetronic / EVI / Minitimer
• Connector Type B: 2012+ Honda
• Configuration: Wired pigtail adapters
• Direct plug-and-play installation with no splicing required
• Sold as a set for high-performance fuel injector upgrades

Simplify your fuel system upgrades or wiring harness repairs with this set of four BLOX Racing EV14 female fuel injector pigtails. These connectors are engineered to provide a secure, low-resistance electrical connection for Bosch EV14 (USCAR) style fuel injectors, making them essential for modern EFI conversions and replacing brittle or damaged factory plugs.

Each connector features high-quality wire leads designed to be soldered or crimped into your existing engine harness. The housing includes a positive-locking clip to prevent accidental disconnection caused by engine vibration or heat cycling. Built to withstand the harsh environment of a high-performance engine bay, these pigtails ensure consistent signal delivery for precise injector timing.

• Manufacturer Part Number: BXFU-00603-EV14-4
• Connector Type: EV14 / USCAR (Female)
• Quantity: Set of 4 pigtails
• Compatibility: Fits standard Bosch EV14 and similar USCAR-style fuel injectors
• Wire Leads: Durable high-temperature insulation