hey whats up everyone, im new to the z but have alot of experience with modifying my cars. Im sure this question gets asked all the time and people are told to do a search due to my participation in other forums, so my apologies in advance. But which exhaust yeilds the greatest gains with the Z, same question holds for the intake. Thanx

 

Stillen has the greatest gains according to a recent magazine article

but it's heavier than stock