One has to be careful with things like porting and polishing when using a turbo. Velocity plays an equal role with overall exhaust flow in regards to producing a desired level of boost with a minimum of lag. I won't say that things can't be improved on by 'P & P ing' but only a lot of experiance with a particular engine will tell you how much is too much. Bruce Benson > The key is that DMCH is NOT proponent of turbocharging > power-ups (still quoted on their web site). The mods > are not completely exclusive, as the port and polish, > and exhaust mods should be ammenable to turbocharging, > but the hot cam would not. > Pete