The Air/Oil Separator solves a simple problem from the manufacturer; it transfers the oil back into the engine via the block not the intake. This not only keeps the vehicle within specs of smog but keeps the oil from coating the tops of the pistons. We all know what that does to any tune you have; it causes detonation, a very bad thing for turbo engines. 

So if you want to keep your engine running consistently and strong for years to come make sure you install a race and street proven product from leaders in the industry. 

The newest version of the air oil separator features a coolant line pass system, which helps the unit run more efficiently in cold climates or short trips. Making this ideal for any street going car, or full blown race car! 

This AOS is only for stock location turbos. It will not work with rotated mount setups.

ITEM NOTES:

MFG SKU:

S0713

VEHICLE NOTES:

APPLICATIONS:

2015+ Subaru STI