Performance... if you mean that the engine torque it restricted thus putting a bit more to the ground, then yeah, I could tell the difference. Is it something on par with a header/cat replacement, no. My issue was, after I took it off for winter, I simply never put it back on and figured I might as well just sell it.

 

Just curious, how much would you sell it for? Oh and would it fit 5AT

 

Sorry, already sold it a while ago. My post didn't state that.