CSF water cooler for Subaru Impreza WRX & STI 02-07 with integrated oil cooler

The first models of this new "O" series are for the Subaru platform: 02-07 STI/WRX (CSF #3076O), 08-14 WRX and 08-20 STI (CSF #7042O). These 2 applications were developed in conjunction with leading Subaru engine builders and race tuners, LIC Motorsports of Northern California. CSF also reached out to one of our top race teams, Subaru tuners and dealers; Snail Performance to help with customization and performance testing in the hot Arizona desert where they are regionally located.

These coolers feature a dual-row 42mm core with CSF's exclusive B-Tube technology and a highly efficient 6.5mm multi-fin cooling fin for maximum surface contact, heat dissipation and extreme performance.
Equipped with a racing style aluminum drain plug for quick and reliable fluid changes
CSF 1.4 bar (20 psi) radiator cap
Designed and engineered to allow for a complete "drop-in-fit" installation. Works with all OEM brackets, connectors, AC capacitor, hoses and fan shrouds (requires only minor adjustments at connection points)
Fitted with a heavy duty 4 plate oil cooler built into the lower end tank. A water-to-oil cooler is much more efficient than a traditional air-to-oil cooler. Tested in the ISO-certified CSF laboratory to dissipate heat better and faster than a 10-row air-to-oil cooler. In addition, the oil temperature is regulated by the thermostat of the cooling system due to the installation in the lower end tank. You no longer have to worry about operating temperatures not heating up fast enough in cold weather.
Complete with 2 AN-10 fittings and compatible with many popular aftermarket engines and exhaust manifolds.
This kit comes complete with a Greddy machined thermostatic sandwich plate and BAT forged -10 right angle fittings.
It's all finished off with the industry's best 1 hour hand polish "mirror finish" for a look to match the performance.
Installation of this unit requires an additional 1/4 to 1/2 liter of oil.