I was just wondering if bigger injectors and a TST or edge wouls be better than an edge and a TST stacked. I have my edge and TST stacked and i am still getting my ass kicked by the Duramax stacked trucks. What can we do to get serious power out of these trucks with only one turbo. Our rules do not allow for twins. But we still want to be able to pull a trailer with it. I know what you are thinking you can't have your cake and eat it too. But i did with my 01. My 03 seems so hard to get power out of it. The transmission is a full out ATS so it will handle what ever we come up with. I need advice???