PERRIN 08-21 Subaru STI Top Mount Intercooler (TMIC) - Black

Perrin Top Mount Intercooler — Subaru STI 08-21, Black (PSP-ITR-302BK)

The largest top-mount intercooler on the market for the STI, and Perrin pushed every dimension to get there.

Core is 21.87" wide x 7.64" deep x 3.95" thick — just over 660 cubic inches. That's 75% larger than the stock intercooler and 12% larger than the nearest competitor's core. More cross section means less restriction and more cooling capacity, which is the whole job of a TMIC on an EJ.

3/8" bar and plate construction — more durable than traditional tube and fin, and more free-flowing than other cores. End tanks feature smooth radiused corners that reduce air turbulence, which is where a lot of intercoolers quietly give power back.

Rated well over 600 whp. Dyno proven to add a consistent 10+ wheel horsepower, and it'll keep up with the rest of your bolt-ons rather than becoming the restriction.

No tuning required. This is straight bolt-on power — no ECU recalibration needed to see the gain.

Pressure tested to 50 psi. Powder coated black finish to protect it from the elements.

Fitment: 2008-2014 and 2015-2021 Subaru STI. EJ257.

Roughly 1.5 hours to install. Silicone coupler included.

5 year manufacturer warranty.

Not CARB legal. Off-road use only, not for sale in California.