Think bill at badger 5 does em. Don't quote me but I think he charges about £1100.....
Is a couple of pops and bangs worth that?
Unless you want to take it up to serious power not worth it. Spend the £1100 on mapping, inter cooler, exhaust, filter, suspension etc etc.
Power ain't nothing without blah blah blah...
As ronin said. Without rods. BANG!
Ak