Fits 2015+ Mazda Miata ND models. The ISR Performance Circuit Spec Exhaust is engineered to provide an aggressive tone and improved exhaust flow for the fourth-generation MX-5 chassis. This system is designed for enthusiasts seeking a performance-oriented sound profile and a lightweight alternative to the factory exhaust setup.

• Direct bolt-on installation using factory mounting points
• Circuit Spec series optimized for high-flow performance and aggressive acoustics
• Designed specifically for the 2015+ Mazda Miata ND platform
• Manufacturer Part Number: IS-CSEXH-ND

Fits 2006-2013 Mazda Miata (NC chassis) models.

The ISR Performance Circuit Spec Exhaust is engineered to minimize backpressure and optimize exhaust flow for the 2006-2013 Mazda Miata NC. This system focuses on weight reduction and performance, making it an ideal choice for track use and spirited driving where exhaust efficiency is critical.

Built to handle the rigors of high-RPM operation, the Circuit Spec series replaces the heavy, restrictive factory muffler and piping with a streamlined design. The result is a more aggressive exhaust note and improved throttle response across the powerband. It bolts directly to the factory mounting points for a straightforward installation process.

• Lightweight construction reduces overall vehicle weight compared to OEM
• High-flow design for improved exhaust scavenging and performance
• Precision-engineered fitment specifically for the NC Miata chassis
• Durable construction designed to withstand high-heat track environments
• Manufacturer Part Number: IS-CSEXH-NC

Fits 1990-1993 Mazda Miata NA (1.6L).

The ISR Performance Circuit Spec Exhaust is a high-flow system designed specifically for the 1.6L Miata chassis, prioritizing maximum exhaust scavenging and weight reduction. Built for the track, this system replaces the restrictive factory exhaust components with high-quality, mandrel-bent stainless steel piping to eliminate bottlenecks and improve throttle response.

• Direct bolt-on installation to factory mounting points
• Mandrel-bent stainless steel construction for optimal flow and corrosion resistance
• Designed for circuit use with an aggressive, performance-oriented exhaust note
• Significant weight savings compared to the heavy OEM muffler assembly
• Includes all required gaskets and hardware for a complete install
• Manufacturer Part Number: IS-CSEXH-NA16

Fits 1994-1997 Mazda Miata NA models (1.8L).

The ISR Performance Circuit Spec Exhaust is a high-flow exhaust system engineered for the 1.8L NA Mazda Miata. Designed to replace the restrictive factory setup, this performance exhaust optimizes scavenging and exhaust gas flow to improve engine response and power delivery. The Circuit Spec series is developed with a focus on weight reduction and flow efficiency, making it an excellent choice for track-oriented builds and spirited street driving.

• Designed specifically for the 1994-1997 Mazda Miata (1.8L)
• High-flow Circuit Spec piping for improved performance
• Bolts directly to factory mounting locations and hangers
• Manufacturer Part Number: IS-CSEXH-NA

The ISR Performance 90mm V-Band Clamp (IS-CL-090MM) provides a high-tension, leak-free seal for critical exhaust connections. Specifically engineered for use with ISR and Garrett 3-inch GT Series turbine discharge housings, this clamp ensures a robust union between the turbocharger and the downpipe, capable of withstanding the extreme heat and vibration of high-performance forced induction systems.

The V-band design offers a significant advantage over traditional multi-bolt flanges, allowing for quicker disassembly and simplified clocking during installation or maintenance. This clamp is a direct replacement or essential component for custom turbo setups utilizing the common 3" GT turbine housing exit.

• Manufacturer Part Number: IS-CL-090MM
• Clamp Size: 90mm
• Compatibility: ISR and Garrett 3-inch GT Series Turbine Discharge housings
• Construction: Heavy-duty hardware for reliable clamping force and thermal stability

Fits Nissan 350Z and Infiniti G35 models.

The ISR Performance Full Subframe Solid Inserts are engineered to eliminate the compliance and movement inherent in factory rubber rear subframe bushings. These CNC-machined inserts fill the voids in the OEM bushings, effectively locking the subframe to the chassis. This modification is essential for track and drift applications where predictable suspension geometry and reduced wheel hop are critical during high-load cornering or hard launches.

• CNC-machined aluminum construction for maximum durability
• Eliminates subframe deflection and drivetrain slop
• Improves chassis rigidity and power delivery to the ground
• Installs directly into factory subframe bushing locations
• Manufacturer Part Number: IS-AZ002

Note: Installing solid subframe inserts will result in increased NVH (noise, vibration, and harshness) within the cabin, as the damping properties of the factory rubber are removed in favor of direct chassis connection.

The ISR Performance IS-AFNZ40BLT is a specialized high-flow air filter designed for enthusiasts using the popular Nissan N62 or Z32 Mass Air Flow (MAF) sensors. Unlike universal clamp-on filters that require separate adapters, this unit features a dedicated bolt-on flange that secures directly to the MAF housing, ensuring a leak-free seal and accurate sensor readings.

This filter is an essential component for custom intake setups or as a direct replacement for existing Z32/N62-based induction systems. The filtration media is engineered to increase airflow volume while maintaining the high filtration standards required to protect internal engine components from debris.

• Direct bolt-on compatibility with N62 and Z32 MAF sensor flanges
• High-flow filtration media for improved induction efficiency
• Replaces restrictive or worn filters in custom turbo or NA applications
• Includes necessary mounting hardware for a secure installation
• Manufacturer Part Number: IS-AFNZ40BLT

The ISR Performance Universal Air Filter is a high-flow filtration solution designed for custom intake systems, turbocharger inlets, or as a replacement for worn filters on existing aftermarket setups. Engineered to reduce intake restriction while maintaining necessary engine protection, this filter features a 3-inch (76mm) inlet diameter to accommodate standard performance piping.

• Manufacturer Part Number: IS-AF3040CLP
• Inlet Diameter: 3 inches
• Mounting Type: Clamp-style for secure attachment to intake pipes or turbo inlets
• Application: Universal design compatible with most 3-inch induction systems

This clamp-style filter provides a reliable seal and is built to withstand the rigors of performance driving. It includes the required mounting clamp for a straightforward installation on your vehicle's intake tract.

Designed for Nissan SR20DET engines, the ISR Performance Fuel Rail Adapter (IS-9537) provides a reliable solution for modifying your fuel delivery system. This adapter is engineered to bolt directly to the factory SR20DET fuel rail, replacing the stock fuel pressure regulator to allow for the connection of an external regulator or custom AN fuel lines.

• Direct fitment for Nissan SR20DET factory fuel rails
• Simplifies the installation of an aftermarket fuel pressure regulator (FPR)
• Essential for custom fuel system plumbing and performance tuning
• Precision-machined for a leak-free seal under high pressure
• Manufacturer Part Number: IS-9537

Fits 1989-1994 Nissan 240sx (S13) models.

The ISR Performance 5-lug rear conversion hub is a direct-fit solution for S13 owners looking to upgrade from the restrictive factory 4x114.3 bolt pattern to the standard 5x114.3 pattern. This conversion is essential for enthusiasts wanting to access a wider variety of aftermarket wheel options and more robust brake configurations.

Engineered to install into the factory rear upright, this hub provides a reliable and precise mounting surface for your drivetrain and braking components. Whether you are replacing a damaged conversion hub or performing a custom build, this single-unit offering ensures compatibility and ease of installation.

• Manufacturer Part Number: IS-5LG-S13R
• Position: Rear
• Bolt Pattern: 5x114.3
• Fitment: Nissan 240sx S13 (1989-1994)
• Quantity: Single Hub

Gain the necessary clearance for oversized brake calipers or suspension components with the ISR Performance 5mm wheel spacer. This slip-on spacer provides a precise increase in track width, allowing you to fine-tune wheel fitment for a flush stance without the need for complex modifications.

• Thickness: 5mm
• Dual Bolt Pattern: 4x114.3 and 5x114.3
• Center Bore: 66.1mm
• Quantity: Sold individually
• Manufacturer Part Number: IS-451143-5

The 66.1mm hub bore is specifically sized for a wide range of Nissan and Infiniti hubs, ensuring a centered fitment. Because these are sold individually, they are ideal for staggered setups or replacing a single damaged unit.

Fits 2003-2008 Nissan 350Z (Z33) models equipped with LS-series engine swaps.

When performing an LS conversion on the Nissan Z33 chassis, managing oil pan clearance against the factory crossmember and steering rack is one of the most critical steps. The ISR Performance Oil Pan Kit is specifically engineered to work in conjunction with LS swap mounts to ensure the engine sits at the correct height and orientation for optimal weight distribution and ground clearance. This kit replaces the bulky factory LS pan with a low-profile design that integrates seamlessly into the 350Z engine bay.

• Designed specifically for LS engine swaps into the 2003-2008 Nissan 350Z (Z33) chassis.
• Provides necessary clearance for the factory front crossmember.
• Includes high-flow oil pickup tube designed for the pan's sump depth.
• Manufactured with precision-machined surfaces for a reliable, leak-free seal.
• Complete kit includes oil pan, pickup tube, gasket, and installation hardware.
• Manufacturer Part Number: IS-350LS-OILP-KIT

Fits 2003-2008 Nissan 350Z (Z33) for GM LS-series V8 engine conversions.

The ISR Performance LS Swap Mounts are engineered to facilitate the installation of a GM LS-series engine into the Z33 chassis. These mounts are designed to provide precise engine placement within the engine bay, ensuring proper driveline alignment and hood clearance. Built to withstand the torque and vibrations of a high-performance V8 swap, these mounts replace the factory VQ-series mounting brackets with a high-strength solution suitable for street, drift, or track use.

• Manufacturer Part Number: IS-350-LSMB
• Compatible Chassis: 2003-2008 Nissan 350Z (Z33)
• Engine Compatibility: GM LS-series (LS1, LS2, LS3, LS6, LS7)
• Designed for optimal engine positioning and clearance

The ISR Performance 3in 2-Bolt Exhaust Gasket (IS-2BLT) provides a durable, high-temperature seal between 3-inch exhaust flanges. Designed to replace worn, leaking, or blown-out gaskets, this component is essential for maintaining proper backpressure and preventing exhaust leaks that can trigger check engine lights or skew oxygen sensor readings.

• Specifically designed for 3-inch (76mm) internal diameter exhaust systems
• Standard 2-bolt flange configuration for broad compatibility with aftermarket and custom exhausts
• Constructed from high-temperature resistant materials to withstand extreme thermal cycling
• Ensures a leak-free connection between downpipes, cat-back sections, or mufflers
• Manufacturer Part Number: IS-2BLT

Fits 1989-1998 Nissan 240SX (S13 and S14 chassis).

The ISR Performance Version 2 Short Throw Shifter (IS-240SSV2) is engineered to provide a significantly shorter shift stroke and a more precise, mechanical feel compared to the factory unit. By reducing the distance the gear lever travels between gates, this shifter allows for faster gear engagement and more consistent performance during spirited driving or track use.

This V2 unit is a direct bolt-on replacement for the OEM shifter, mounting directly to the factory transmission location. It is an ideal solution for S-chassis owners looking to eliminate the vague, rubbery feel often found in aged stock shifters.

• Direct replacement for the factory shifter assembly
• Significantly reduced throw for faster shifting
• Updated Version 2 design for enhanced shift feel
• Bolts directly to factory mounting points
• Manufacturer Part Number: IS-240SSV2

The ISR Performance S-Chassis LS Swap Y-Pipe (IS-240LS-Y) is a purpose-built exhaust component designed to bridge the gap between your LS-swap headers and the rest of your exhaust system. Specifically engineered for Nissan S-Chassis vehicles running a GM LS-series V8 engine, this Y-pipe simplifies the plumbing of a high-performance swap by providing a direct-fit solution that eliminates the need for custom fabrication.

Constructed to handle the high-flow demands of a V8 engine, this Y-pipe is tucked tightly into the transmission tunnel to maintain maximum ground clearance—a critical factor for lowered S13 and S14 drift or street builds. It provides a clean, streamlined merge to optimize exhaust scavenging and facilitate a professional-grade installation.

• Manufacturer Part Number: IS-240LS-Y
• Fits Nissan S-Chassis with GM LS-Series V8 engine swaps
• Designed for optimal ground clearance in the factory exhaust tunnel
• Streamlined Y-merge for efficient exhaust gas flow
• Direct bolt-on compatibility with ISR Performance LS Swap headers

Fits 1989-1998 Nissan 240SX S13 and S14 chassis equipped with GM LS-series engine swaps.

The ISR Performance Oil Pan Kit is engineered specifically to provide the necessary clearance for LS-based V8 swaps into the Nissan S-chassis. This kit solves common fitment challenges associated with factory GM oil pans, ensuring proper alignment with the S13/S14 front crossmember and steering rack while maintaining appropriate ground clearance for lowered vehicles.

• Engineered for rear-sump LS engine configurations in S-chassis swaps
• Provides essential clearance for the factory S13 and S14 front crossmember
• Includes oil pan, pickup tube, gasket, and installation hardware
• Manufacturer Part Number: IS-240LS-OILP

Fits 1989-1994 Nissan 240SX (KA24DE).

The ISR Performance aluminum radiator is engineered to provide significantly improved cooling efficiency over the aged factory unit. Built with a high-flow aluminum core and TIG-welded end tanks, this radiator provides superior heat dissipation for both street and track use. It is a direct-fit replacement for the S13 chassis, designed to bolt into the factory mounting points without modification.

• Material: All-aluminum construction for maximum thermal conductivity
• Installation: Direct bolt-on for 1989-1994 Nissan 240SX with KA24DE engine
• Performance: High-flow core design reduces heat soak during spirited driving
• Durability: TIG-welded tanks for high-pressure reliability
• Manufacturer Part Number: IS-240KA-RADS13

The ISR Performance VQ35DE Swap Mount Kit (IS-240-VQMKT) provides the essential structural foundation for installing the Nissan 3.5L V6 engine into a 240sx chassis. Designed for precise engine positioning, these mounts ensure proper driveline alignment and hood clearance, simplifying one of the most critical steps in the VQ conversion process.

Built to withstand the increased torque and weight of the V6 powerplant, these mounts offer a secure, rigid connection to the factory subframe. They are engineered to provide the durability needed for high-performance driving while maintaining the clearance required for swap-specific headers and intake components.

• Direct fitment for Nissan 240sx chassis swaps
• Designed specifically for the VQ35DE (3.5L V6) engine
• Engineered for optimal engine placement and weight distribution
• High-strength construction to handle high-torque output
• Includes manufacturer part number: IS-240-VQMKT

Fits Nissan S13 and S14 240SX S-Chassis during T56 transmission conversions.

The ISR Performance T56 Master Cylinder Conversion Kit (IS-240-T56MCK) is a purpose-built hydraulic solution for enthusiasts swapping a Tremec T56 6-speed transmission into the Nissan S-Chassis platform. This kit replaces the factory master cylinder with a unit properly sized for the hydraulic requirements of the T56 slave cylinder, ensuring a clean pedal feel and complete clutch disengagement.

A standout feature of this kit is the included remote speed bleeder. On T56 swaps, accessing the bleeder valve inside the bellhousing can be nearly impossible once the transmission is mated to the engine. This remote line allows you to bleed the system from the engine bay, significantly simplifying maintenance and setup. The high-pressure lines and adapter hardware are designed to bolt directly to the S-Chassis firewall for a professional, secure installation.

• Direct-fit master cylinder for Nissan S13/S14 firewall
• Optimized hydraulic ratio for T56 slave cylinders
• Remote speed bleeder line for easy clutch bleeding outside the bellhousing
• Includes high-pressure braided lines and necessary fittings
• Manufacturer Part Number: IS-240-T56MCK

Fits Nissan 240sx S13 and S14.

The ISR Performance JZ / R154 Swap Mount kit is engineered to simplify the installation of a Toyota JZ-series engine (1JZ or 2JZ) into the Nissan S-chassis when paired with the R154 manual transmission. These mounts are designed to facilitate proper engine placement, maintaining essential hood clearance and driveline alignment for a clean, reliable swap. This kit provides a precise, bolt-on solution that replaces the need for custom-fabricated brackets, ensuring your engine and gearbox are secured to the factory mounting points.

• Compatible with 1JZ and 2JZ engine blocks
• Designed specifically for use with the R154 manual transmission
• Direct fitment for S13 and S14 Nissan 240sx chassis
• Facilitates correct driveline geometry and hood clearance
• Manufacturer Part Number: IS-240-JZMKT-R154

Fits Right-Hand Drive (RHD) Nissan 180SX and Silvia S13/S14 models.

Replace your aging, brittle factory hard lines with the ISR Performance Stainless Steel Power Steering Rack Lines. In high-performance or track-driven S-Chassis vehicles, OEM steering rack lines are prone to cracking or leaking under increased pressure and engine bay temperatures. These stainless steel lines provide a robust, high-pressure solution that is much easier to route and install, especially during engine swaps or when clearance is tight.

Designed specifically for RHD steering racks, this kit ensures a reliable connection and consistent steering feel by eliminating potential leak points associated with worn-out factory hardware.

• Construction: High-grade stainless steel for corrosion resistance and durability
• Orientation: Specifically for Right-Hand Drive (RHD) steering racks
• Installation: Replaces factory rack-to-rack hard lines
• Fitment: Nissan 180SX, Silvia S13, and Silvia S14 (RHD)
• Manufacturer Part Number: IS-240-416RHD

Fits 1989-1998 Nissan 240SX S13 and S14 (LHD models).

The ISR Performance Stainless Steel Power Steering Rack Lines are designed to replace the often-corroded or leaking original equipment hard lines. On the S-chassis, factory power steering lines are prone to fatigue and rust, leading to fluid loss and potential steering rack damage. These replacement lines are constructed from durable stainless steel, providing superior resistance to the elements and a reliable seal for your hydraulic system.

• Direct replacement for factory power steering rack hard lines
• High-strength stainless steel construction prevents corrosion and failure
• Precision-engineered for Left-Hand Drive (LHD) steering racks
• Specifically designed for the Nissan S13 and S14 chassis
• Manufacturer Part Number: IS-240-416

Fits 1989-1998 Nissan 240SX (S13 and S14 chassis).

The factory high-pressure power steering lines on the S13 and S14 chassis are a common failure point, often developing leaks due to age, vibration, and the extreme heat generated in performance or turbocharged applications. The ISR Performance High Pressure Power Steering Line (IS-240-413) is engineered as a direct-fit replacement to restore steering integrity and reliability.

Constructed to handle the demanding hydraulic pressures of the steering rack, this line replaces the restrictive and prone-to-leak OEM assembly. Whether you are refreshing a daily driver or prepping a drift car, this reinforced hose provides the durability needed for consistent steering feedback and a leak-free engine bay.

• Direct replacement for the original high-pressure steering hose
• Designed for the 1989-1998 Nissan 240SX chassis
• Durable reinforced construction to resist heat and high hydraulic pressure
• Simplifies engine bay routing compared to bulky factory lines
• Manufacturer Part Number: IS-240-413

Fits 2009+ Hyundai Genesis Coupe models.

The ISR Performance Stainless Shorty Clutch Line (IS-240-412-G) is designed to replace the factory rubber section of the clutch hydraulic system. Standard rubber lines are prone to expansion under heat and pressure, which often results in a vague or spongy clutch pedal feel. By upgrading to a stainless steel braided line, you eliminate line swell, ensuring a firmer and more consistent pedal response during spirited driving or heavy track use.

• Stainless steel braided construction for superior durability and pressure resistance
• Eliminates factory rubber line expansion for a more direct clutch feel
• High-quality fittings ensure a precise, leak-free connection
• Direct replacement for the factory shorty line section
• Manufacturer Part Number: IS-240-412-G

Fits 1989-1998 Nissan 240SX (S13 and S14) models.

The ISR Performance stainless steel shorty clutch line kit is designed to replace the factory rubber hose between the hardline and the clutch slave cylinder. On the S-chassis platform, the original rubber line can expand under heat and pressure, leading to a soft or "mushy" clutch pedal feel. This stainless steel braided upgrade provides a more direct connection, improving pedal modulation and engagement consistency during performance driving.

• Replaces factory rubber clutch hose (Shorty style)
• Stainless steel braided construction for durability and pressure resistance
• Improves clutch pedal feel and response
• Direct bolt-on fitment using factory mounting points
• Manufacturer Part Number: IS-240-412

Fits 1989-1998 Nissan 240SX (S13 and S14 chassis).

The ISR Performance Auto-to-Manual Conversion Clutch Line is engineered to streamline the hydraulic plumbing required when swapping an automatic 240SX to a manual transmission. This one-piece braided stainless steel line eliminates the factory hard line and damper loop assembly, providing a direct connection from the clutch master cylinder to the slave cylinder for a cleaner engine bay and more reliable operation.

• Designed specifically for automatic-to-manual transmission conversions
• Braided stainless steel construction resists expansion under high pressure
• Provides firmer, more consistent clutch pedal feel compared to factory rubber lines
• Eliminates multiple OEM hard lines and potential leak points
• Direct fitment for S13 and S14 manual swap configurations
• Manufacturer Part Number: IS-240-411

Fits Nissan SR20 and KA24 series engines (SR20DE, SR20DET, KA24E, KA24DE).

The ISR Performance 60°C Low Temperature Thermostat is an essential cooling system upgrade for enthusiasts pushing their vehicles on the track or in high-load environments. By opening at a lower temperature than the standard factory unit, this thermostat allows coolant to circulate through the radiator earlier, effectively managing engine heat soak and maintaining more consistent operating temperatures.

This component is engineered as a direct-fit replacement for the OE unit, bolting into the factory thermostat housing without modification. It is specifically designed to handle the increased thermal demands of modified SR and KA engines.

• Opening Temperature: 60°C (140°F)
• Direct drop-in replacement for factory Nissan thermostats
• Improves cooling efficiency during high-performance driving
• Compatible with SR20DE, SR20DET, KA24E, and KA24DE engines
• Manufacturer Part Number: IS-21200-60

Designed for Nissan vehicles equipped with the VQ35DE engine, the ISR Performance Low Temperature Thermostat is a critical cooling system upgrade for track-driven or high-performance street builds. By opening at a lower temperature (68°C) compared to the factory unit, this thermostat allows coolant to circulate through the radiator earlier, helping to manage engine heat soak and maintain stable operating temperatures during sustained high-load conditions.

This unit is a direct replacement for the stock thermostat, featuring a high-quality wax element for reliable operation. It bolts directly into the factory thermostat housing, making it an essential preventative maintenance item or performance upgrade when refreshing your cooling system.

• Opening Temperature: 68°C (154.4°F)
• Engine Compatibility: Nissan VQ35DE
• Optimizes cooling efficiency for performance applications
• Direct replacement for OEM thermostat
• Manufacturer Part Number: IS-21200-31U13

Fits Nissan models equipped with VQ35HR and VQ37VHR engines.

The ISR Performance 68-Degree Low-Temp Thermostat is an essential cooling system upgrade for high-performance VQ-series engines. By opening at a lower temperature than the factory unit, this thermostat allows coolant to circulate through the radiator earlier, effectively managing engine heat during spirited driving, track sessions, or in high-ambient temperature environments.

• Lower 68-degree Celsius opening temperature helps prevent heat soak and maintains peak performance
• Designed as a direct-fit replacement for the OE unit
• Precision construction for reliable valve operation and cooling system integrity
• Critical for forced induction or high-RPM naturally aspirated builds
• Manufacturer Part Number: IS-21200-31U03