ok i have a dual custom exhaust but i recently purchased an 05 or 06 (cant remember) stock coupe exhaust and im wondering what you guys think...just put the oem back on...or leave my dual and have an xpipe custom welded?..if you look at my sig you can see what i got..i also have kinetix hfc and unorthodox pulley on the way...let me know what you guys think..by the way i want to gain my torque back w/out sacrificing too much up top power..thanks!

 

You don't know if yours is an 05 or 06?

 

i purchased to exhaust off of someone from g35 driver..i have a g cp by the way..and i dont remember if it was 05 or 06..not really a big deal is it?..and i have one more question...im gonna be adding the hfc and pulley so will i still need a a/f tune if i switch back to oem exhaust?...