Are smaller than the stock ICs and thus very restrictive in high HP cars, so that is another thing to take into consideration when just looking at IC efficency and intercoller piping size. Both Ash and T0M have gone to 2.5" inlet and outlet for this very reason. Now, if someone were to modify the Stillen IC's to have better inlets and outlets, they would be the ultimate IC for stock piping IMO....
m a g l i t o parts are FINALLY here - engine is going back together NOW sig photo by me effects by ZXRider(SoCal)