This is a MUST HAVE for your Powermax. The stock Powermax comes with a HORRIBLE cast compressor wheel that causes slow spool up, high egts, and low power. Our drop in 63.5mm Single plane GTX style billet wheel solves all those problem and will make it feel like a new turbo . They are simple to install and will help improve your turbo performance. Our testing has shown that the 11 blade single plane wheels perform better than the stock dual plane design. This wheel comes 100% balanced.