how woulda leaky downpipe gasket affect performance on a 98 uk turbo? ive fitted a sports cat a while ago and i think i can hear it blowing when cold from the downpipe gasket, would it affect performance significantly?

im going to get a new gasket and change asap.

cheers

Rich

 

if its the gasket from turbo to downpipe it could all sorts of problems with back pressure and could! cause overboost if its blowing badly.