I knew the stock clutch wasn't going to hold forever, either way I went to the track this past friday. Fisrt run: 14.01 @ 105, slow fisrt gear launch. Second run: 13.99 @ 89, this was only without 4th gear. When shiffting into 4th, it didn't went into gear. I cross the finish line in neutral. Caused by excessive wear of stock clutch. Running 93octane at 20psi and silencer on muffler.