I'm getting an exhaust made up for my Astra (fitted with a LET). At present it's got Courtenay's bodged welded pipe. I know for a fact this is restrictive, so I want a bigger diameter pipe the full lenght of the car.
Questions is... What diameter is sufficient? What's ideal and damn right stooopid!
What diamter have other turbo owners used?
Cally / Cav / Astra / Nova etc....