Is your current clutch bad? If it is, with the power you have I'd stick with an ACT SB4-HDSS . The twin disc is going to make more noise and I don't think you'll be happy with it.
no not bad, but someone said they'll give me theirs for $6xx for almost a brand new one. My goal on the car 400whp. So maybe save it for future use? Or is the clutch still too much for that power range.
Stock clutch is fine. Leave it at that. If needed, use the ACT as liquid force said. You dont want a twin disc. Seriously.