performance headers
Helps to know the budget also. I say this because if u put a set of long tubes on you have to mount the O2's in a different spot than stock. The factory puts them close to the engine and they read very close to the exhaust. When u move them down stream u need to tune the transport delay so the exhaust reaches the sensor at the right time. Otherwise the O2's will be reading exhaust that is further away from the engine.

