tdi exhausts

[hajb]

has any one up grade there exhaust on tdi does it help to go better and what was the cost

[Greg Roles]

Depends on the TDI, but the common theme is bigger is better to help turbo flow, and I've been told the Mk4 / 5 at least are "reasonable" without any muffs at all! Personally I still aim to have at least a resonator in my Mk5. A 2 litre or so would be hard pressed to out flow a decent mandrel bent 2.5 to 3" pipe, but I noticed the stock pipe on my Mk5 is both quite large at 2.5", and mandrel bent. Noice!

It's the old turbo golden rules. Inlet, Exhaust, Intercooling then PSI.