yea i hear ya on that but remember its 6500 with the tec 3 the actual kit i put together was right arounf 4500 minus the clutch and exhaust brings down to about 3500-3800.
that Eurobahn kit i recomend as well. its a well put together Centrifugal supercharger kit and you wi make your 320 easily with 42lb injectors and a good tune.