STM Small Battery Kit for 02-07 WRX/STi COP The stock valve will require

The stock valve will require a custom hose for recirculation

Definitely do some more research if you're trying to get these in an Evo 7

Fits Evo 5-9 with Brembo Calipers

we still recommend data logging and making fine adjustments as needed

STM-EVOX-BATK1-GEN16-BR

STM Small Battery Kit for 02-07 WRX/STi COP The stock valve will requireThe STM 680 small battery kit for 02 07 WRX STi allows you to install a smaller, lighter battery to save 24 pounds while lowering the center of gravity. This kit fits cleanly in the stock location and installs in minutes with the new tie down hardware. Includes a non slip pad to keep the battery snug and reduce shock while driving. The battery tie down kit is available with or without the Odyssey PC680. Battery purchase will include a set of new