Very happy with my DHM high comp piston. I previously had intake, exhaust, TB cam and CJR ECU flash. That was a huge improvement over stock. Now, adding the high comp piston puts me at 'Stage 3' and has restored some of the bottom end I lost with the TB cam but also added more power everywhere else. It was my first time doing a modification like this but it was very straightforward. Very pleased with the results and DHM customer service is top notch!