Hey I got my car custom flash tuned with a stock cat back exhaust but im yhinking of putting on a cat back turbo exhaust or a really quiet redback 2"5 inch..I definatly woulrnt thibk u need to retune the whole car again for just a cst back exhaust..whats ur thoughts? Thx..also I got the flash tunrr box here with the programs if anyone needed that info ty

I wouldn't think you'd need to reflash it. I've heard of some BF's needing to be flash tuned after a cat back exhaust has been fitted but I think that is mainly due to the 2nd oxygen sensor which is not present on BA's. Someone else here will confirm.

Gab

Cheers gab i hope not btw wgats difference between a xrt exhaust and a redback I want it quiet whats the performance difference cheers

The stock twin 2.25 xr6t exhaust will outflow and sound better than any single 2.5" redback system.