[DrKevM5]

I was initially disappointed with my Stage 4 because I didn't feel an appreciable increase over Stage 1 to justify the investment. About 5 weeks in, the car started developing a weird screech/howl on hard acceleration. I'm thinking bad wastegate or bad turbo. Take it to my guy, and it turns out the initial installer never tightened the clamps on both sides of the intercooler! There were also other fittings that weren't properly secured. After everything was secured, this thing is TOTALLY different!! An absolute rocket! I'm running 295s at the rear, and I'm still getting wheelspin on hard acceleration in 3rd gear. Gives me an excuse to go to the PS 4S early now cause these PSSs aren't going to last long. Very happy with my investment now.