so uh..... couple questions. first, it seems a bit down on HP. Second, why is it running hotter than usual? I asked several times if i would need a tune, and everyone said no. sure? and no, the pipes were free and clear upon install, no obstructions. sounds perfect, no leaks, no rattle, no buzz. so this leads me to believe that the car needs tuned........ I dont understand how lowering back pressure on an NA engine would have ANY effect on it at all. intake side yes, exhaust side no. WTF IS GOING ON!!!! maybe there is a drop in flow VELOCITY??? im not sure if the ark DTS is any bigger diameter than the nismo, I think they are both 2.5. But I do know that its not MORE restrictive, so its not back pressure...... only thing i can think of is that there was a drop in exhaust velocity which is a bad thing. Im going to go have it tuned to see its a real issue or not, couldnt hurt anyway as even the stock nismo tune is pretty conservative compared to tuning it for stupid tree hugging hippy gas consumption reasons. I dont care if my car gets 15 mpg as long as it runs like a sports car should.
sounds good though....
