probably a noob question but i wanted to know if my car is currently dyno tuned with a catback and i wanna replace it back to stock style...would it affect anything aside from the power..?? i have a catless short dp n a catted tp...

 

yeah you would need to retune that dude...if it was just a catback you would be ok but a testpipe and a downpipe can cause problems if changed

 

+1 you will need a retune for sure because you aftermarket exhaust is free flowing were the stock is restrictive

 

but i left the shorty dp and testpipe on the car n i just replaced the testpipe back....still an issue?

 

Well it can be and it may not be
cause as i said its very restrictive compared to aftermarket
what made you go back to stock?

 

noise complains n multi police stops..o can i get a different catback to avoid havingto retune

 

What exhaust do you have now?

ETS V2 Quiet looks close enough to OEM to a cop and the noise can be kept under control, especially compared to a single-exit style.

If you have a dual-exit and it's been too loud you might want to consider a resonated TP or HFC...and a re-tune.

 

all depends on your afr's and how much it changes after you switch back