Fits 2005-2013 Chevrolet Corvette C6.

Engineered to meet the thermal demands of high-performance driving and track use, the Koyo Racing Radiator (RH313986) is a high-capacity upgrade for the Chevrolet Corvette C6. This radiator replaces the factory unit with an all-aluminum design that significantly improves heat dissipation compared to original equipment radiators with plastic end tanks. Its robust construction ensures long-term durability and more consistent operating temperatures under load.

• Direct-fit application utilizing factory mounting locations and connections
• Fully brazed all-aluminum construction for maximum thermal efficiency
• Precision TIG-welded tanks for increased strength and pressure resistance
• High-density core designed for racing and spiritied street applications
• Manufacturer Part Number: RH313986

The Koyorad SK-C13 Type A Hyper Radiator Cap is designed to improve cooling system performance by increasing the coolant boiling point. By maintaining a higher system pressure of 1.3 Bar (1.3 kg/cm²), this cap provides an additional margin of safety against boil-over during high-performance use or under extreme thermal loads.

• High Pressure Rating: 1.3 Bar (approx. 19 PSI) for increased heat capacity and boiling point.
• Deep Plunger Style: Specifically engineered for filler necks requiring the Type A deep plunger depth.
• Direct Fitment: Designed exclusively for Koyorad radiators equipped with Type A (Red Label) filler necks.
• Durable Construction: Features a high-quality valve and spring assembly to maintain consistent pressure under stress.
• Manufacturer Part Number: SK-C13

Fits 2006-2011 Honda Civic Si and 2008 MUGEN Si (2.0L).

Maintain optimal operating temperatures in your 8th Gen Honda Civic with this Koyo radiator. Designed as a direct-fit replacement for the factory cooling unit, this radiator is engineered specifically for manual transmission (MT) coupe and sedan models. It provides the reliable thermal management necessary for the high-revving K-series engine, whether for daily commuting or performance driving.

• Direct replacement for 2006-2011 Honda Civic Si 2.0L models
• Compatible with 2008 Honda Civic MUGEN Si
• Designed exclusively for Manual Transmission (MT) applications
• Precision-engineered to factory mounting specifications
• Manufacturer Part Number: V2926

Replace the fragile factory plastic component with the Koyo Aluminum Filler Neck (FN3037), engineered specifically for the 2022 Toyota GR86 and Subaru BRZ. High-performance cooling systems often experience increased pressure and thermal cycles that can cause original equipment plastic filler necks to crack or warp over time, leading to coolant loss and potential overheating issues.

• Direct replacement for the OEM plastic filler neck unit
• Constructed from high-grade aluminum for superior durability and heat resistance
• Precision-machined for a perfect fit with factory hoses and radiator caps
• Eliminates a common failure point in the cooling system
• Manufacturer Part Number: FN3037

This aluminum filler neck is a vital upgrade for drivers who track their vehicles or live in hot climates, ensuring the integrity of the cooling system under demanding conditions.

Upgrade your cooling system's reliability with the Koyo Aluminum Filler Neck (FN2320), specifically engineered for the 2013-2016 Scion FR-S and Subaru BRZ. The factory plastic filler neck is a well-documented weak point in the ZN6/ZC6 platform, often becoming brittle and prone to cracking after repeated heat cycles. This Koyo component provides a robust, permanent solution for both daily driven and track-oriented vehicles.

Constructed from high-grade aluminum with precision TIG welding, this filler neck is a direct-fit replacement that bolts into the factory mounting position. It is designed to work seamlessly with original equipment cooling system components and maintains compatibility with standard radiator caps.

• Direct replacement for the failure-prone factory plastic filler neck
• Durable TIG-welded aluminum construction for superior heat resistance
• Ensures long-term cooling system integrity and prevents leaks
• Fits 2013-2016 Scion FR-S and Subaru BRZ
• Manufacturer Part Number: FN2320

Maintain optimal fluid temperatures during track use or high-performance street driving with the Koyo 35 Row Universal Oil Cooler. This high-efficiency heat exchanger is engineered to prevent oil breakdown and protect vital engine or drivetrain components from excessive thermal stress.

Constructed from lightweight aluminum, this cooler features a high-density 35-row core that maximizes surface area for superior heat dissipation within an 11.25-inch by 11-inch footprint. The integrated -10AN ORB (O-Ring Boss) provisions provide a reliable, leak-free connection point for custom plumbing and allow for a wide range of fitting adapters to suit your specific application.

• Manufacturer Part Number: XC351111W
• Core Dimensions: 11.25in x 11in x 2in
• Row Count: 35-Row Core
• Port Style: -10AN ORB provisions
• Material: High-grade aluminum construction
• Application: Universal fitment for custom oil cooling solutions

Maintain optimal oil temperatures during high-performance driving with the Koyo XC251108W 25-row oil cooler. Engineered for efficient thermal management, this compact heat exchanger provides the surface area necessary to dissipate heat in demanding environments, whether on the track or in high-load street applications. The core utilizes a 25-row design to maximize fluid cooling while maintaining a manageable footprint for custom mounting. This unit features integrated AN-10 ORB (O-Ring Boss) provisions, allowing for secure, leak-free plumbing with a variety of fitting options.

• Manufacturer Part Number: XC251108W
• Core Dimensions: 11.25in x 7.5in x 2in
• Cooling Rows: 25
• Inlet/Outlet Size: AN-10 ORB provisions
• Construction: Durable aluminum for superior heat transfer and corrosion resistance

Engineered for high-performance thermal management, the Koyo 19-row universal oil cooler provides critical heat dissipation for engine or drivetrain lubricants. This unit features a compact 11.25" x 5.75" x 2" core designed to maximize surface area and airflow, preventing oil thinning and thermal breakdown during heavy track use or high-stress street driving.

This cooler is equipped with AN-10 ORB (O-Ring Boss) provisions, ensuring a secure and leak-free connection when used with compatible adapter fittings. Its robust aluminum construction offers excellent durability and efficient heat transfer characteristics, making it an essential upgrade for maintaining stable operating temperatures.

• 19-row high-efficiency core design
• Core Dimensions: 11.25in x 5.75in x 2in
• Inlet/Outlet: AN-10 ORB provisions
• Material: High-grade aluminum
• Manufacturer Part Number: XC191106W

Maintain optimal oil temperatures during high-performance driving with the Koyo 10-row oil cooler. This compact core is engineered for efficient heat dissipation where mounting space is limited, providing reliable thermal management for modified street or track-driven vehicles. The unit features dual AN-10 ORB provisions, allowing for secure, leak-free plumbing and versatile fitting options for custom oil line configurations.

Constructed with high-grade aluminum and precision brazing, this cooler (MPN XC101103W) offers the durability and pressure resistance expected from a professional cooling solution. This is a universal component designed for integration into custom engine or drivetrain oil cooling circuits.

• Manufacturer Part Number: XC101103W
• Core Type: 10-Row
• Dimensions: 11.25in x 3in x 2in
• Inlet/Outlet Ports: AN-10 ORB provisions
• Material: Brazed Aluminum

The Koyo XC052304 is a universal-fit fluid cooler engineered for versatile thermal management in custom automotive applications. Featuring a proven tube and fin design, this cooler provides efficient heat dissipation while maintaining a lightweight profile. It is an ideal solution for auxiliary cooling of engine oil, transmission fluid, or power steering systems.

The crossflow configuration optimizes the fluid path to maximize surface area exposure, ensuring consistent temperature control even under high-load conditions. As a universal component, it provides the flexibility needed for custom mounting and plumbing in various performance or utility setups.

• Manufacturer Part Number: XC052304
• Design: Tube and Fin
• Flow Configuration: Crossflow
• Application: Universal auxiliary fluid cooling
• Construction: Lightweight aluminum assembly

Fits 2001-2005 BMW 325Ci, 325i, 325xi, 330Ci, 330i, and 330xi (Manual Transmission).

The Koyo Performance Radiator (VH422857) is a precision-engineered cooling solution specifically designed for the E46 BMW chassis equipped with the M54 engine. This unit is built to meet the exact cooling requirements of manual transmission models, offering a high-quality alternative to OE plastic-tank radiators that are prone to fatigue and failure over time.

• Direct-fit replacement for factory radiator mounting points and hose connections
• Optimized for Manual Transmission (M/T) non-M3 models only
• Engineered for consistent thermal management in M54-equipped 3-series vehicles
• TIG-welded construction for enhanced durability and pressure resistance
• Manufacturer Part Number: VH422857

Fits 2014-2019 Ford Fiesta ST.

The Koyo VH322965N aluminum radiator is engineered for high-performance cooling in the compact Ford Fiesta ST engine bay. Featuring a 36mm Hyper Core, this radiator provides increased cooling capacity over the factory unit while maintaining a slim profile that simplifies installation. The integrated NFLO Triple Pass technology directs coolant through the radiator core three times before returning to the engine, significantly improving heat dissipation efficiency during heavy track use or spirited driving where heat soak is a concern.

• 36mm Hyper Core maximizes surface area for superior thermal exchange
• NFLO Triple Pass design optimizes coolant flow for lower outlet temperatures
• All-aluminum construction with precision TIG welds for maximum durability
• Compatible with factory mounting points and cooling fan shrouds
• Finished in a polished luster for a professional engine bay appearance
• Manufacturer Part Number: VH322965N

Fits 2013-2017 Ford Focus ST (2.0L).

Upgrade your cooling system with the Koyo VH322787N Racing Radiator, specifically engineered for the Ford Focus ST. This high-performance radiator replaces the failure-prone factory unit with a robust, all-aluminum construction designed to withstand the thermal loads of track use and spirited driving. By increasing coolant capacity and improving heat dissipation, it helps prevent heat soak and protects your 2.0L EcoBoost engine during demanding conditions.

• Direct-fit installation using factory mounting points and fan shrouds
• Fully TIG-welded aluminum construction for superior durability over OE plastic-tank radiators
• Optimized core design for maximum thermal efficiency
• Precision-machined filler neck and drain plug
• Manufacturer Part Number: VH322787N

Fits 2004-2008 Subaru Forester XT, XT Limited, XT Premium, and Sports 2.5 XT (2.5L Turbo).

This Koyo performance radiator is designed as a direct-fit cooling solution for SG-chassis Foresters equipped with manual transmissions. Engineered to maintain stable operating temperatures for the 2.5L turbocharged engine, it serves as a reliable replacement for aged or failing factory units. Please note that installation on 2004-2005 XT models requires a minor return hose modification for proper fitment.

• Designed specifically for Manual Transmission (MT) applications
• Maintains critical cooling efficiency for turbocharged 2.5L engines
• Compatible with factory mounting points and fan shrouds
• 2004-2005 XT models require minor return hose modification
• Manufacturer Part Number: VH13026

Fits 2022-2025 Subaru WRX.

The Koyo VH093890 All-Aluminum Performance Radiator is engineered as a direct-fit upgrade for the VB-platform WRX, addressing the limitations of the factory cooling system. By replacing the failure-prone plastic end tanks of the OE unit with precision TIG-welded aluminum, this radiator provides superior durability and thermal management. Whether you are daily driving or subjecting the vehicle to high-stress track conditions, the increased cooling capacity ensures more consistent operating temperatures.

• Full all-aluminum construction for enhanced heat dissipation and longevity
• High-density core designed to maximize cooling efficiency within factory space constraints
• Precision TIG-welded tanks for high-pressure reliability
• Direct-fit design utilizes all factory mounting points, fan shrouds, and hoses
• Manufacturer Part Number: VH093890

Fits 2003-2007 Subaru Impreza WRX, WRX Limited, WRX TR, WRX STI, and WRX STI Limited models equipped with a manual transmission.

The Koyo VH091672 is a high-performance, all-aluminum radiator designed to replace the fragile plastic-tank factory unit in the Subaru GD chassis. This specific model features an integrated filler neck, making it the correct choice for the cooling system configuration found in early 2003-2007 Impreza WRX and STI models. Engineered for a drop-in installation, it utilizes factory mounting points and is compatible with OEM fan shrouds and hoses.

• All-Aluminum Construction: Precision TIG-welded tanks and a high-density core provide superior durability and heat dissipation compared to OE crimped-plastic radiators.
• Nocolok Brazing: Manufactured using a state-of-the-art brazing process to ensure core strength and leak-free performance under pressure.
• Direct Fitment: Designed to install without modifications, accepting all factory sensors and hardware.
• Application Specific: Engineered exclusively for Manual Transmission (MT) models requiring a radiator-mounted fill point.
• Part Number: VH091672

Fits select 2005-2019 Subaru Baja, Impreza, Legacy, Outback, and WRX (2.5L).

The Koyo VH091662 radiator is engineered to provide efficient heat dissipation for high-performance Subaru boxer engines. This unit is designed specifically for manual transmission (MT) models and features an integrated filler neck for cooling system serviceability. It includes an adapter provision with an M14 x 1.25 thread to accommodate various sensor or bleed configurations.

This radiator is compatible with both 8mm (STI) and 13mm (WRX) pipe diameters, ensuring a precise fit across multiple platforms. Built to handle the demands of both daily driving and spirited use, it serves as a robust replacement for the factory unit.

• Manufacturer Part Number: VH091662
• Configuration: Manual Transmission (MT) Only
• Features: Built-in Filler Neck
• Adapter Provision Thread: M14 x 1.25
• Submodel Fitment: STI (8mm pipe) and WRX (13mm pipe) compatible
• Application: Legacy NA and Turbo MT models

Fits select 1999-2001 Subaru Forester and Impreza models including Base, L, S, Outback, and RS (2.5L).

The Koyo VH091163 Performance Radiator is engineered to provide superior heat dissipation for the 2.5L Subaru boxer engine. This unit is designed as a direct-fit replacement, utilizing factory mounting points and hose locations to ensure a straightforward installation without the need for custom fabrication. It serves as a critical cooling upgrade for maintaining stable operating temperatures during spirited driving or daily commutes.

• Direct-fit installation using OE mounting points
• Engineered for improved thermal efficiency over stock units
• Precision-manufactured for consistent fit and durability
• Compatible with 1999-2001 Forester and Impreza 2.5L platforms
• Manufacturer Part Number: VH091163

Fits 2002 Subaru Impreza WRX (2.0L).

This Koyo replacement radiator is designed specifically for the 2002 Subaru Impreza WRX equipped with the 2.0L engine and manual transmission. This configuration is engineered for early 2002 models that do not utilize a filler neck on the radiator assembly.

• Direct replacement for 2002 Subaru Impreza WRX
• Compatible with 2.0L Turbo powerplants
• Engineered for Manual Transmission (MT) applications only
• Fits models originally equipped without a radiator filler neck
• Manufacturer Part Number: VH090866

Fits 1993-1998 Subaru Impreza (2.2L) models equipped with a manual transmission, including Base, Brighton, L, LS, LX, Outback, and RS submodels.

The Koyo VH090632 is a direct-fit replacement radiator designed to restore efficient cooling to your first-generation Subaru Impreza. Built to handle the thermal demands of the 2.2L Boxer engine, this radiator serves as a reliable solution for replacing a leaking, clogged, or cracked factory unit. It maintains the original equipment (OE) mounting points and cooling hose configurations for a straightforward installation process without the need for modifications.

• Manufacturer Part Number: VH090632
• Engine Compatibility: 2.2L
• Transmission: Manual Transmission (MT) only
• Precision-engineered for consistent coolant flow and heat dissipation
• Durable construction to withstand vibration and thermal cycling

Fits 1991-1994 Subaru Legacy Sport (2.2L) with manual transmission.

Maintain optimal operating temperatures and protect your engine from overheating with the Koyo VH090302 radiator. This unit is designed as a direct-fit replacement for the 1991-1994 Subaru Legacy Sport equipped with the 2.2L turbo engine and manual transmission, ensuring factory-level fitment and reliable thermal management.

• Manufacturer Part Number: VH090302
• Application: 1991-1994 Subaru Legacy Sport (2.2L)
• Transmission Compatibility: Manual Transmission (MT)
• Construction: Engineered for efficient heat dissipation and durable service life
• Installation: Replaces worn or leaking OE radiator units using existing mounting points

Fits 2016-2020 Honda Civic EX, EX-L, EX-T, LX, LX-P, Si, Sport, Sport Touring, and Touring (1.5L).

Keep your engine within optimal operating temperatures with this Koyo replacement radiator. Engineered as a direct-fit solution for the 10th-generation Honda Civic equipped with the 1.5L engine, this radiator ensures reliable heat dissipation to protect your engine under various driving conditions. It is an ideal replacement for a leaking or inefficient factory unit, restoring the integrity of your cooling system.

• Manufacturer Part Number: VH083283
• Precision fitment for the 1.5L engine platform
• Maintains factory cooling efficiency and system pressure
• Direct replacement for OE radiator (Excluding Type R models)

Authoritative Fitment:

• 2016-2020 Honda Civic EX
• 2016-2020 Honda Civic EX-L
• 2016-2018 Honda Civic EX-T
• 2016-2020 Honda Civic LX
• 2016-2018 Honda Civic LX-P
• 2017-2020 Honda Civic Si
• 2017-2020 Honda Civic Sport
• 2017-2020 Honda Civic Sport Touring
• 2016-2020 Honda Civic Touring

Fits select 1994-2000 Honda Civic and Civic del Sol models equipped with manual transmissions and without air conditioning. This Koyo radiator (MPN VH0812N1) is engineered for DOHC engine configurations requiring precise cooling and specific fitment tolerances.

Designed as a direct replacement for manual transmission vehicles, this unit features 32mm hose inlets and outlets. For increased installation stability, Koyo includes an optional mount on the lower driver’s side of the radiator to provide additional support where needed. Please note this cooling unit is specifically designed for vehicles without air conditioning systems and will not clear AC components.

• Manufacturer Part Number: VH0812N1
• Application: DOHC engines with manual transmission
• Hose Connection: 32mm
• Hardware: Includes optional lower driver-side support mount
• Compatibility: Non-AC models only

Vehicle Fitment:

• 1994-1997 Honda Civic del Sol (Si, VTEC)
• 1996-1997 Honda Civic del Sol S
• 1999-2000 Honda Civic (CX, DX, EX, GX, HX, LX, Si)
• 1999 Honda Civic Value Package

Fits 2000-2009 Honda S2000 Base and CR models (2.2L) with manual transmissions.

The Koyo VH081226 radiator provides reliable cooling performance for both daily driving and spirited track use. Engineered as a direct-fit replacement for the OE unit, this radiator maintains proper engine operating temperatures and bolts directly to factory mounting locations. This unit is specifically designed for Manual Transmission (MT) applications and includes a necessary fan switch adapter to ensure a trouble-free installation.

• Direct replacement for 2000-2009 Honda S2000 factory radiator
• Includes fan switch adapter for simplified install
• Optimized for manual transmission (MT) configurations
• High-quality construction for improved thermal efficiency
• Manufacturer Part Number: VH081226

Fits 2006-2007 Mazda 6 Mazdaspeed (2.3L).

The Koyorad VH062779 Racing All Aluminum Radiator is a high-performance cooling solution designed to replace the failure-prone factory unit. Built to handle the thermal demands of the turbocharged 2.3L engine, this radiator eliminates the risk of cracked plastic end tanks by utilizing full TIG-welded aluminum construction. This design provides superior durability and enhanced heat dissipation whether on the street or the track.

• Direct-fit design for 2006-2007 Mazdaspeed 6 models
• High-density core optimizes cooling efficiency and heat transfer
• Precision TIG-welded aluminum tanks for maximum pressure resistance
• Engineered to maintain factory mounting points and fan shroud compatibility
• Manufacturer Part Number: VH062779

Fits all 2006-2015 Mazda MX-5 Miata models with manual transmission, including Sport, Club, Grand Touring, and Special Edition trims.

The Koyorad VH061885 is a high-performance racing radiator engineered for the third-generation (NC) MX-5. Constructed from aircraft-grade aluminum, this radiator features a specialized core designed to maximize heat dissipation and maintain stable operating temperatures during spirited driving or track use. Unlike factory units with plastic tanks, the Koyorad design utilizes precision TIG-welded aluminum tanks for superior durability and resistance to high-pressure cycles.

• Direct-fit design compatible with factory mounting points and fan shrouds
• Full aluminum construction with high-density cooling fins
• TIG-welded tanks for maximum durability under extreme conditions
• Engineered specifically for manual transmission (MT) applications
• Manufacturer Part Number: VH061885

Fits 1999-2005 Mazda Miata (1.8L) models with manual transmission, including Base, LS, Mazdaspeed, 10th Anniversary, SE, and Shinsen trims.

Protect your engine from overheating with this Koyo radiator, specifically engineered for the NB-generation Mazda MX-5 Miata. Designed as a direct-fit replacement for the factory unit, this radiator ensures reliable thermal management for your 1.8L engine during daily commuting or spirited driving. It is built to maintain precise tolerances and provides a straightforward installation into the factory mounting points for manual transmission models.

• Designed specifically for 1.8L NB Miata models with manual transmissions
• Precision-engineered for efficient cooling and reliable heat dissipation
• Replaces leaking or brittle factory radiators to prevent engine damage
• Compatible with factory mounting hardware and fan shrouds
• Manufacturer Part Number: VH060650

Fits 1990-1997 Mazda Miata (1.8L) manual transmission models including Base, LE, M Edition, SE, and STO trims.

Protect your engine from overheating with a Koyo replacement radiator. Designed to meet or exceed the cooling performance of the original factory unit, this radiator is a direct-fit solution for the NA-generation Mazda Miata. It mounts to factory locations and utilizes existing hoses for a straightforward installation, making it an ideal choice for replacing a leaking or brittle OE radiator.

• Direct replacement for manual transmission (MT) vehicles
• Compatible with factory mounting points and cooling fans
• Durable construction for consistent thermal performance
• Manufacturer Part Number: VH060245

Fits select 2008-2019 Nissan 370Z, Infiniti G37, and Infiniti Q60 models with manual transmissions. This Koyo radiator (VH023478) is specifically engineered for track-focused or performance vehicles that have removed the air conditioning system. On factory Z34 and V36 chassis, the radiator and AC condenser are often an integrated modular unit; this component replaces that assembly with a high-efficiency standalone radiator, streamlining the cooling stack and eliminating the condenser core.

• Precision Engineering: Designed specifically for manual transmission (6MT) applications where the factory AC condenser is being removed or bypassed.
• Optimized Core: Features Koyo's advanced construction to maximize thermal transfer for consistent engine temperatures during high-load use.
• Direct Fit: Mounts to factory locations for a straightforward installation on the V36 and Z34 platforms.
• Durable Construction: Built to Koyo's exacting standards for material thickness and weld integrity to withstand the rigors of performance driving.

Specifications:
Manufacturer Part Number: VH023478
Transmission Type: Manual Transmission (6MT) Only
Notes: Eliminates the integrated AC condenser; for vehicles without air conditioning.

Fits 2003-2006 Nissan 350Z models equipped with the VQ35DE engine and manual transmission.

Maximize your cooling system efficiency with the Koyo Aluminum Cross Flow Radiator. Engineered as a high-performance replacement for the factory unit, this radiator (MPN: VH021568) is specifically designed to handle the thermal demands of the VQ35DE power plant. Its cross-flow configuration ensures optimal coolant travel and heat dissipation, making it a critical upgrade for both daily driving and track-focused 350Z builds.

Built to precise tolerances, this radiator bolts directly to factory mounting locations for a straightforward installation. By replacing a worn or plastic-tanked OE unit with Koyo's robust design, you ensure more stable operating temperatures and increased protection for your engine under high-load conditions.

• Direct fit for 2003-2006 Nissan 350Z (Base, Enthusiast, Grand Touring, Performance, Touring, Track)
• Compatible with VQ35DE engines and manual transmissions
• Optimized cross-flow design for superior heat transfer
• Retains factory mounting points for easy installation
• Manufacturer Part Number: VH021568