| Recirculating the wastegate gas lower down the downpipe definitely gives you gains over combining the exhuast gases straight out the back of the turbine.. Running a open external W/G is illegal. The best exhaust for F/I is the least exhaust, shorter and larger the better.
Having said that I have gone through various setups and you do get better off boost response with smaller piping and it does make a noticeable difference before you get used to it unlike most mods. |