SRT-4s are impressive cars out the gate, and with a couple of changes are pretty nasty.Now the advantage your GSR turbo has IS as long as you built everything correctly, your turbo is gonna be sized better for your power goals, and your gonna have a more agressive top end. The SRT-4s stock turbo is small because it was designed to feel like a bigger motor, with a smooth power band. As long the SRT-4s your pitting your self against havent done to much, you should be able to handle them