as title says do i need retune my car after switch to more restrictive tp??
tahnks for opinnions.

 

ofcourse..

 

yeah that's what i tought, i have to put resonated tp b/c cannot stand drone any more. it's even worse with windows up , and winter is coming..

 

Uhhhh. Not really. In fact I wouldn't be suprised if nothing changed at all. the AFR might change a tiny bit, but as far as REQUIRING a retune I highly doubt it. Maybe some tuner can chime in.

 

^ that. wont be that big of a change but to get the best gains or in your case goin backwards in your gains a tune would be better.

 

You don't need a tune at all. As far as the exhaust is concerned, you're going from a straight pipe to a straight pipe. Resonators are straight through. All you're doing is quieting the exhaust tone, not adding any restriction whatsoever.

Even if you were swapping to a high flow cat, they flow enough that there isn't a significant restriction which would require a retune.

 

Probably not but i guess for IDEAL performance you might want to.

 

This is probably pretty accurate. I don't think the resonation would change the flow a whole lot.

 

Resonation doesn't change the flow at all. There's nothing inside a resonator that protrudes into the exhaust stream. It's a straight pipe.

Straight through, no restriction, just a quieter tone afterwards

 

No retune needed. As long as pipe diameter is the same.

 

thanks guys!!! that's good news spoke with my tuner and he confirms that too. have to get resonated tp at least just for winter , drone with closed windows during highway cruise is CRAZY!!! hope that resonated tp gonna help me.
thanks again!!

 

it will

 

yeah i put res tp about one month ago, it's way better less vibrations and drone. thinking about put one more actually.