Originally Posted by Boosted Performance

OP, you can't go wrong with either one of these kits. Both are build with the same quality, and both Tony and I stand behind our products.

The two kits are however very different, but offer similar performance results. The two graphs above show you that both kits are capable of 10psi at 3,500rpm. The rest of the numbers will all depend on the tuner, and how comfortable he is with the fuel, timing, confidence in the engine, use of the car (road/track)...ect.