Originally Posted by Itsmeagain
commonly used on jap cars with the smaller turbos that have that kind of exhaust outlet, seems to have a benefit from tests.
useless on cossies and bigger turbos as the turbine oulet is totally different
Not really the case now..... used to be the "IN" thing with the Scoobs (It was called a twin dump system). That was until it was accepted that an open mouth, but bigger bore pipe was better.
