allevocai

Hard to say. Only had the car a few weeks before the exhaust change so it was difficult to compare. It would be seat of the pants stuff anyway, no real tangible data to analysis. In theory, it should help HP because its 1/4" larger in pipe size than std. Next on the list is a high flow cat. Hopefully, this will help with spooling turbo up Cheers

Hey dude, we have BA xr6t sedan and are real happy with Redback cat back system. It still replacing half of the exhaust system but it does produce a nice burble at idle and not too loud under load. It ended up being exactly what we were looking for on daily driver. Cheers