i had the ST190 from pumaspeed.I had 186 hp at the dyno.BUT only from 6.400 to 6900 rpms.Below that it was crap.So i removed the kit and went to another solution

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I have heard that SWR kit is also good http://stevewyndhamracing.com/shop/product_info.php?products_id=32

his page is currently having a small problem.
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2.3 engine,Supercharger,Intercooler,Cosworth inlet,Quaife diff,Dreamscience,Full Milltek,KW Variant 1,AP Racing brakes 330mm.