i will soon have a turbo'd gs-r. i will most likely see 350 hp after all installs. what clutch should i get? i was told the xtreme performance from ACT. i'm not sure though. second, i want a flywheel as well. should i get steel or aluminum? what weight? i was told aluminum flywheels ten dto cause the clutch to slip (summitracing.com). but i don't think it does. anything else i should (have to) replace with the clutch and flywheel (i.e. various bearings)?

 

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The XTSS should be a nice streetable disk for your setup. I have an 8.8lb ACT Prolite flywheel and it is really nice. You will want to replace the throwout and pilot bearing, but those should come in the clutch kit.