I was told that If I switch exhausts and get high flow cats that I need to retune....is this really neccesary? Running stock cats on a 3 inch single currently....I want to switch back to my old nismo with high flow cats....

 

i did the same kind of switch with my old vortech and it ran great without a retune. just keep your eye on the wideband.

ideally yes, i wouldnt want to get a retune.

btw, the nismo exhaust is perfect for low to mid psi supercharged cars. my car ran better with the nismo than aam single 3" inch.

 

I got crawford HFC for sale

 

fixed the detonation issue?

 

Ideally you should re-tune. You will probably run a bit more on the lean side.
What you don't want to dish another $600 j/k

 

I would cause when i get rid of my little borla and step up to either the greddy tic or the FI 3" exhaust my tuner said he would like to tweak a few things.

 

i just got hks hi power dual exhaust w/popcharger and thats about it for my performance mods. so i need a retune?

 

just reset ur ecu

 

nope lol

 

iv'e switched out my dp and exhaust w/o retune and it works fine.

 

I say retune, I did and are still NA and noticed even at the seat of my pants id i notice. Went from single with cats to true dual with resonated TP.

 

still got the high flows for sale wannabuy350?