...ok ok...look...the 2wd manifold is only effcient to around 550bhp as i keep saying...why would you want to go over this as you are having to use more boost to acheive the goal....now more boost is surely more strain on componants especially head gaskets..not to mention more heat..so yes using a 2wd manifold past 550bhp is stupid

So if you spec an engine over this then the engine is flawed and as the geezer above says you spend all this cash on a big power motor and leave a stock manifold on

My own car would need 2.5bar boost from my GT35 to reach 570-580bhp ...put the tubular manifold on and your now seeing less boost to acheive that bhp and less strain....personally i wont run above 2bar so i am not over the safe threshold of the manifold.