Looking to upgrade your car’s cooling system? Here are the best radiators for a Mazda RX-7 that you can buy today.

Just like us, cars don’t enjoy working in hot conditions. So, if you’re asking for more power from your RX-7’s engine, the least you could do is keep it running cool. If you don’t, you could end up with a very expensive mechanical failure on your hands.

Whether you’ve got a an older FC or a more agile FD, this handy little guide should point you in the right direction when it comes to choosing an upgraded radiator for your Mazda RX-7. Oh, and since some of these modern classics are turbocharged, we’ve also included some uprated intercoolers for optimal temperature management. Let’s get into it…

Best Radiator for a Mazda RX-7 FC

Koyorad radiator for FC RX-7


RRP: M-Series – $431.93 / £344.61, R-Series – $453.60 / £362.88

As far as aftermarket radiator specialists go, Koyorad are one of the top names in the business. They even made it onto our shortlist of the best radiator brands of all time! So, you know that you’ll be getting a quality product for your FC if you buy from them.

There are a few different Koyo radiators available for the FC. The M-Series variant is a mid-range offering boasting a 36mm thick core with 2 layers, designed to appeal to the cheaper end of the market. Further up the range, there’s the R-Series radiator. This has a 48mm core and promises 30% better cooling efficiency than the standard OEM radiator.

Best Radiator for a Mazda RX-7 FD

RE-Amemiya RX-7 FD radiator and intercooler kit


RRP: $2843 / £2268. Buy it here.

If you want upgraded aftermarket parts for your Mazda RX-7 FD, it’s hard to look beyond Japanese tuning specialist RE-Amemiya. This tuning house is synonymous with the Mazda brand, particularly their rotary-engined sports cars.

Given that all FDs were twin-turbocharged from the factory, you’re going to need both a radiator and an intercooler upgrade in these cars, so RE-Amemiya has gone ahead and produced a handy bundle package. The 3-layer aluminum radiator and V-mount intercooler have been put to the test in the high performance beasts of the renowned D1 GP drifting championship. So, whatever sort of build you’re chasing, this kit should be more than up to the task.

GReddy intercooler

Best Intercooler for a Mazda RX-7

If you’ve got a turbo variant of the FC, or if you’ve converted an N/A model to forced induction, you’ll want an upgraded intercooler. The job of an intercooler is to use outside air to cool the post-turbo/supercharger pressurized air that’s being fed in to your FC’s engine.

If you don’t own an FD or if you just don’t fancy the combined RE-Amemiya package mentioned above, there are other options you can seek from the aftermarket. While there are some cheaper choices around, the two options that stand above the rest in our eyes are the GReddy kit and the HKS kit.

You can source the GReddy kit ($1347 / £1075) in a spec that’ll fit either the FC or the FD, but the HKS Type R intercooler ($1967 / £1569) is only compatible with the FD RX-7. Whichever you choose (if you’ve got the budget), you’ll benefit from some of the most efficient track-capable cooling technology around – not to mention a ton of JDM street cred!