Ya, the stock clutch has issues with the high rpm shifts. I had a Spec Stage 1 in my 2011 GT. It was great. Nice pedal effort and engagement feel. Never had an issue with 6K+ launches. Well, besides the rear end staying together. lol
Exedy has a good reputation. I used McLeod in the past with good success. But have seen several issues being posted by others in the last couple of years. Kind of concerning.
Do you have a clutch line upgrade already? Another item to get if you don't. Cheap and easy to install.
I havent done anything to the clutch at all. The stock clutch held up fine launching at 7k at the track day on the slick. It was just high RPM shifting, particularly in 4th, and occasionally in 3rd. I wouldnt have thought that was a clutch issue traditionally, but that is what I've seen pretty much everywhere about these cars.
When you say clutch line upgrade, is that just the braided part on the slave cylinder that you see in these clutch kits, or is there an entire replacement line?
What happened with your rear end? I've made a shit-ton of power through an 8.8 before and never had an issue. Was definitely not concerned for something on stock horsepower, but now you have me worried