What is the max boost you can hit on stock sleeves on a GSR?

 

From I Robot:

I'm sorry, my responses are limited. you must first ask the right question

It's about how much heat and power the motor is exposed to, not PSI. I've seen as high as over 500whp on stock sleeves, but no one has long term results (about 3 years + is considered reliable to me). The stock motor itself about 350whp, then its really time to change components internally.