Ive been looking at the qtp cut out's again cause i had one on my srt4 and it sounded great and it spooled faster but ive been reading that you need to retune for one, noww my evo has full exhaust with no cats so theres really nothing holding me back now and the cut would just be for a louder exhaust and for the exhaust to escape faster and spool better, now do i really need a retune ?

 

Sorry for the double thread, ***in iphone!

 

if i were you i would retune..so i can sleep at night..it usually goes a bit lean on direct pipe...