Doug's Headers installed with some clearance issues

I would not dent anything until you have verified the engine sits in there according to factory specs that TTI has outlined in that link I posted above. I always had to dent headers in the past on my car until I got the engine sitting in there correctly. My TTI headers didn't fit initially but now they fit with zero clearance issues. No dents either. I run the Shumaker torque strap and that keeps the engine from shifting around a lot so that helps too.