okay, turbo size does matter. 8 psi on most kits that one would put on a GSR should be fine. as long as you make close to 300 whp, but not over that. it will make over 300 and prob last a long time. but then again it may not. 260-280 whp @ around 8 psi is fine. now if you make 280 whp @ 13 psi, then no, it's not good. HP doesnt kill a motor, pressure does