Dennis: I also had the problem with the front pinions in the gearbox stripping, although I had it happen to the rear as well. I'm sure your motor is helping tear apart the drivetrain as well lol. The graphite hex hubs also stripped from so much power. I might add that I'm still running the Associated front one-way and it has held up fine. Jeff Lewis one of the sponsored Associated drivers in my area, also stripped the pinion gears in the diff case last sunday. So this problem is definately happening to a lot of people, and needs some attention. BTW, can I use the stock gasket that comes with the Collari rear exhaust .12 on the associated header? It seems like a somewhat loose fit. Thanks