OK so when the car boost it makes the Whistling sound. Under hard boost is sounds like a squeal and it seem a lil sluggish. And when you run the RPM up the boost keeps climbing. I have gotten the boost so far up to like 13psi. Like when the nettle is in-between the 10 and 15. I haven't let it go any further past that. I'm thanking my cats are clogged up. Cuz A few days before it started, they were rattling bad. Any ideals? Any of you guys ever had this problem?