Originally Posted by mao

Below is the HKS SST Cooler Kit fitted recently to a P.WRX member's MY12 EVO X.

The Factory SST pulls the ecu into safety mode once the SST oil temp reaches 140 degC. This HKS SST Cooler is a must for track work.



Please note that the EVOX SST system underwent minor changes in 2010 and there are major differences in fitment between the early and late models.

Some pics of the install:




Here's where the difference is between the late model EVO Xs and the early ones. Note this is not the only difference as the SST pump and HKS pumps must be re-plumbed for proper cooling. I will provide detailed info to HKS dealers only:


Old HKS instructions that apply to the earlier models. (Note this is not the only difference):


Always use Genuine Mitsubishi SST Oil. You will need 7.5L for this conversion：