The A604 can be used with any stage turbo system. Our version has been tested at 390+ horsepower. In my opinion, we really need to fix a few minor issues before putting a lot of power through it. Upgrade the solenoids, valve body, cooler, and differential for safe measure.

Problems related to the axels and clutches and whatnot are a problem with any high HP setup. At Stage 5 , you'll want a built tranny anyways because you'll break a lot of different stock parts. So my answer to this question is that the ATX can take whatever stage you got!