The Pro's are VERY harsh on a stick shift driveline. It's not a matter of IF it will break.. it's a matter of WHEN. I considered going the Pro route and after some reading up, decided it's not worth leaving my rear axle at the track.
I can tell you that my car left much more violent on slicks then it did these radials i know it sound crazy. But i swear to you the launch was leaps and bounds smoother of a launch . see video below . 6500 rpm 2 step Rev Auto Bolt On Coyote - YouTube
Since I didn't see it posted...what's done to the rear to take the abuse of that many launches? My car spit out the factory traction loc at the ABM fall nats event on its 13th sticky tire pass.