Energy Upper Bumps ***UPDATE***
I have been using the 2 1/2" ones with a little improvement over stock, they work OK. They just mash down and give me little sooner overload engagement. http://www.summitracing.com/parts/ens-9-9109g/...
Forum Discussion
I have the 2 1/2" ones and I filled the opening/voids in mine with some polyurethane caulking. Took a couple weeks to dry through to the center, but they work great. You could probably use some 2 part epoxy that would cure much quicker. They work much better when they dont compress.
