Ok now that I've decided on what and where to buy the clutch and flywheel, I have another question. I will be putting a ProCharger in which will be pushing about 400hp then in about a year I will be doing the shortblock (around 500-550hp). Question is which stage clutch 1-4 should I get and does the aluminum pressure plate make any noticable difference? The Stage 4 says it produces chatter noise so I don't think that would be good since this will be primarily be street driven with track time about 3 times a month.