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Koyo Radiators

Koyorad Performance Racing Radiators

Once you’ve sorted out your new engine, exhaust and wheels, you might notice that things have started heating up. The humble radiator may not be the most glamorous parts of your car, but it’s importance cannot be overstated. If you haven’t got a radiator to match the rest of your car then things can quickly start to go very wrong, very quickly.

Tarmac Sportz would like to introduce you to Koyorad, a company who’ve been dealing with radiators since 1956. Over 60 years of experience, and it really shows in the build-quality, effectiveness and innovation of their radiators.

Koyo Radiators

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Koyo Radiators

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Items 1 to 10 of 39 total

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  1. Koyo Honda CR-Z 1.5L Hybrid Manual (11-13) Radiator

    Koyo Radiator Features:

    • Fully polished to a mirror finish
    • 30% more cooling than standard radiators
    • Handles high revving, high performance motors
    • Perfect for Turbocharged, Supercharged & Nitrous Oxide equipped engines
    • Custom built OEM fit
    • All radiator cores and tanks are specifically designed and built for each application.
    • No universal fit parts are used. This ensures proper fit, just like your original equipment!

    FITMENT

    Honda CR-Z 1.5L Hybrid 2011-2013 Manual Only

    £439.24
  2. Koyo Mazda RX-8 1.3L Manual (04-08) - HH Series Radiator

    Designed for applications where engine configuration/size cause clearances issues for thicker core radiators.  In this case, the 36mm V-Core Series will suit your needs.   Intended for both circuit and daily use. 

    All Koyorad V-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the  stock fan shrouds and fans.

    FITMENT

    Mazda RX8 2004-2008 (Manual Transmission ONLY)

    £381.24
  3. Koyo Mazda RX7 LATE FC Chassis Manual (89-92) N-FLO (Dual Pass) - HH Series Radiator

    Koyo Radiator - HH Series: Koyorad's new 48mm 'HH' Series radiator core features an ultra high fin density to maximize heat transfer. Koyo designs and manufactures each radiator with precision; therefore each one is a direct-fit performance replacement for the stock OE plastic/aluminum radiator for a quick and simple installation with no modifications. Koyo has also integrated a 1/8 Inch NPT female accessory fitting (supplied with a threaded plug) to accept temperature sensors typically included with aftermarket temperature gauges.

    Koyorad quality is a direct result of their privately owned factories which allow Koyorad Japan to oversee each stage of radiator production. This ensures that quality is never sacrificed for quantity. Each Koyo all aluminum radiator core is hand assembled, Nocolok brazed, then TIG welded by hand with the finest aluminum available. These are just a few characteristics that have earned Koyorad Radiators their excellent reputation in performance radiators worldwide.

    -Features-
    - Koyorad 'HH' Series 48mm Hyper Core
    - OE Specific mounting and direct fit
    - Nocolok-R Brazing
    - Precise Tube and Fin alignment
    - Billet aluminum filler neck
    - 1/8 Inch NPT female accessory fitting

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    FITMENT

    Mazda RX7 1989-1992 (Manual Transmission ONLU)

    £339.24
  4. Koyo Mitsubishi Evo 7/8/9 (03-06) - RACE - (Half Size) - HH Series Radiator

    Koyo Radiator - HH Series: Koyorad's new 48mm 'HH' Series radiator core features an ultra high fin density to maximize heat transfer. Koyo designs and manufactures each radiator with precision; therefore each one is a direct-fit performance replacement for the stock OE plastic/aluminum radiator for a quick and simple installation with no modifications. Koyo has also integrated a 1/8 Inch NPT female accessory fitting (supplied with a threaded plug) to accept temperature sensors typically included with aftermarket temperature gauges.

    Koyorad quality is a direct result of their privately owned factories which allow Koyorad Japan to oversee each stage of radiator production. This ensures that quality is never sacrificed for quantity. Each Koyo all aluminum radiator core is hand assembled, Nocolok brazed, then TIG welded by hand with the finest aluminum available. These are just a few characteristics that have earned Koyorad Radiators their excellent reputation in performance radiators worldwide.

    -Features-
    - Koyorad 'HH' Series 48mm Hyper Core
    - OE Specific mounting and direct fit
    - Nocolok-R Brazing
    - Precise Tube and Fin alignment
    - Billet aluminum filler neck
    - 1/8 Inch NPT female accessory fitting

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    FITMENT

    Mitsubishi Evo 7/8/9 2003-2006

    £371.80
  5. Koyo Infiniti G35 Coupe (03-07) & Sedan (03-06) w/VQ35DE Manual - V-Series Radiator

    Koyo Radiator - V-Series: Designed for applications where engine configuration/size cause clearances issues for thicker core radiators. In this case, the 36mm V-Core Series will suit your needs. Intended for both circuit and daily use.

    All Koyorad V-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans.

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    FITMENT

    Infiniti G35 Coupe 2003-2007

    Infiniti G35 Sedan 2003-2006

    Both with VQ35DE Engine

    £347.60
  6. Koyo Acura RSX Base/Type S Manual (02-06) - V-Series Radiator

    Koyo Radiator - V-Series: Designed for applications where engine configuration/size cause clearances issues for thicker core radiators. In this case, the 36mm V-Core Series will suit your needs. Intended for both circuit and daily use.

    All Koyorad V-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans.

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    FITMENT

    Acura RSX Base/Type S 2002-2006

    £322.52
  7. Koyo Subaru Impreza 1.8/2.2L Manual (93-98) - R-Series Radiator

    Koyo Radiator - R-Series: Built with a robust 53mm core, the R-Core Series is engineered for the serious performance tuner. Increased capacity means better cooling reserve when you need it. Intended for both circuit and daily use, you may double your coolant capacity and see up to 35% increased performance over your stock radiator.

    All Koyorad R-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans.

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    FITMENT

    Subaru Impreza 1993-1998

    £318.34
  8. Koyo Honda Civic SI 2.0L (EP3) Manual (02-05) - V-Series Radiator

    Koyo Radiator - V-Series: Designed for applications where engine configuration/size cause clearances issues for thicker core radiators. In this case, the 36mm V-Core Series will suit your needs. Intended for both circuit and daily use.

    All Koyorad V-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans.

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    Honda Civic SI (EP3) 2002-2005

    £304.97
  9. Koyo Nissan Sentra/NX/200SX 1.6L Manual (91-99) - R-Series Radiator w/ 28mm diam. Hoses

    Koyo Radiator - R-Series: Built with a robust 53mm core, the R-Core Series is engineered for the serious performance tuner. Increased capacity means better cooling reserve when you need it. Intended for both circuit and daily use, you may double your coolant capacity and see up to 35% increased performance over your stock radiator.

    All Koyorad R-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans.

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    FITMENT

    Nissan Sentra/NX/200SX 1991-1999

    £304.97
  10. Koyo Acura Integra w/K-Series Swaps 2.0/2.4L (94-01) - V-Series Radiator

    Koyo Radiator - V-Series: Designed for applications where engine configuration/size cause clearances issues for thicker core radiators. In this case, the 36mm V-Core Series will suit your needs. Intended for both circuit and daily use.

    All Koyorad V-Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans.

    Precise Tube and Fin Alignment
    Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer

    Nocolok Brazing
    Tubes, Fins, Headers and Brackets are brazed in a state-of-the-art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements.

    Billet Filler Neck
    Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing.

    OE Specific Mounting and Hand Crafted Heliarc Welds
    Koyo incorporates application specific mounting locations for all fan shrouds, inlet/outlet hoses and top/bottom mounting pins, ensuring quick and pain-free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components.

    Images are for reference only and may differ from actual product

    Acura Integra 1994-2001

    £318.34
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Huge variety in radiators

They offer several different series of radiators, which each have their own strengths, for a variety of cars. The HH Series is designed with an ultra high fin density to maximise heat transfer. On top of that, Koyorad know that you won’t just stop with the HH Series radiator when modifying your car, it also comes with female accessory fittings as standard, so it’ll accept temperature sensors typically associated with aftermarket temperature gauges.

The R-Series is built to go in proper performance cars - with a 53mm core it offers increased capacity so your engine will have a better chance of cooling down when you really need it. The S-Series is a less expensive category of radiator, which uses plastic and copper instead of aluminium, but these radiators still offer great heat dissipation and are perfect for lightly tuned cars.

V-Series are designed for cars which have less space for the thicker core radiators, at only 36mm, these should fit with no issues. For cars which don’t have a lot of space and require the absolute best in performance, Koyorad built the the Hyper V-Series. The fins are arranged in a way that provides maximum surface area to allow heat to radiate effectively and also let air circulate properly.

Unbeatable quality

Tarmac Sportz will only ever sell you parts that are built to the highest standard of quality, reliability and safety. That’s why we were so pleased to learn that Koyorad doesn’t outsource the production of their radiators. They use several privately owned factories to make sure that all of their quality control methods are carried out.

They begin with top grade materials like copper, aluminum, brass and high-resistance plastics - all tested to withstand the harsh outside elements, but also years of being under the hood. Each aluminium radiator core is hand assembled, brazed using Nocolok flux tech and then TIG welded by hand. They believe in quality over quantity and it really shows when you take a look at one of their radiators, they really are solidly put together.

Simple installation

Koyorad make it so easy to install one of their radiators in your car. They manufacture them to to have precisely the same dimensions as the Original Equipment Manufacturer’s radiators for the particular model of car, so no further modification is required - it’ll just slot right in where the original one was. We like it when manufacturers make car modding easy.