i have 300+ hp and i am afraid of the gear box maybe to fail.it is the torque that cause the problem.I am looking for other solutions.
As for clutch i use a helix one.it s heavy!!

this is expensive
http://www.youtube.com/watch?v=fhPnwIe7yfk
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2.3 engine,Supercharger,Intercooler,Cosworth inlet,Quaife diff,Dreamscience,Full Milltek,KW Variant 1,AP Racing brakes 330mm.