I've been running the Competition twin for a while with no complaints. The only downside, at least from what I know from a few years back, they don't supply the hydraulic TB any longer so you would need to source one from Clutchmasters or elsewhere. Unless this has recently changed, that is what I know.

I have the original Competition twin setup that came with the hydraulic TB but they had issues with them in the past and I think they dropped them from the kits because of it. I never had an issue with it, and after speaking with John from InlinePro a while back, the issue with the Competition twin TB can be addressed by smoothing out the lip inside that was rough, and over time cut the seal. While my car is down for a build with Carey Bales, he is supposed to be looking at my TB and addressing any rough area inside of it for me. Just wanted to give this heads up to anyone that has the original Competition TB like I have.