Bit of a daft question possibly, but:

What effect would replacing my Prodrive backbox with a standard STi 5 backbox on my MY00 UK Classic Turbo with PPP.

Obviously there would be less noise but how would performance be effected, would it cause problems with the Prodrive map?

In case you're wondering the Prodrive box is damaged and I have a STi box lying around.

Ta

 

The STi back box is noisier than the UK turbo one, how it relates to the Prodrive (WR kit not PPP at 00MY I thought?) one I don't know, but at a guess its probably about the same!

Simon

 

It will be fine, very little difference in performance in my experience.

Andrew...