Im currently tuned with 320ft lbs torque with ACT 6 puck(HA3-XTR6), served me well but starts to slip under boost. Does anyone have experience with XTD stage 4 found in Ebay. For the flywheel, I still have the stock one, considering getting Fidanza 8lbs, how's the drivability of lightweight flywheel? By the way, car is not a DD and not a track car, weekend streets only. Thanks in advance.

 

i would spend the money on a quality twin disc with the power your making. that ebay crap is not worth damaging a 500hp car

 

i have an xtd stage 3 and its really holding up good, since you have that much power i would go with a clutch that has a a bit more reputation, like exedy and act