I have very little shudder and the car is a blast to drive on my Stage 1+ from Kerma. I get 950 to a take plus and the car is still breaking in @ 20,000 miles. I run the car to 3,000 RPM or more before shifting. So i'm not complaining at all. I would love to see a Dyno of a Malone tuned car and my own car to see the difference. Yes I run my car, No gear box issues or any thing. I'm also going to put Amsoil in my gear box very soon. On another note my car pulls like a train from 1,800 rpm all the way to red line , once she hits 2,000 RPM ...zoom zoom! and still getting fast miles per gallon.