Just wondered if anyone has measured the bhp/torque gains of an uprated 3" downpipe and 200 cell sport cat install on an S3 8l.
Mine has already had a custom SWICT remap, full set of forge silicone hoses including tip, fmic, forge 007 dv etc...but really now only lacks this modification before hybrid/custom turbo which i'm still uncertain about taking on.
Essentially, I guess it's a bangs for bucks question as i've been quoted £500 for the 3" pipe, 200 cell sport cat and approx 4 hours (ball-aching) labour according to Infinity Exhausts Bristol.
In light of the work already done, the car goes very well but i'm keen to allow it to be the best that it can be. I imagine that I would see some gains to torque/bhp but wonder is anyone has measured it and modified in the same order to quantify improvements. Perhaps even describe the way that it felt different in response.
Thanks in advance