I just did an engine rebuild not to long ago on my 89 SC....I had a supercharger sittin on the shelf and i didn't know it at the time, but it was a later model one...so now that the car is on the road i'm gettin 15 lbs of boost pending on the temperature, on a FREEZING cold day itl pin on 15 at like 4 grand, and other days itl take 5500 to pin it on 15....anyways my question is....i know 15 lbs is bad for stock exhaust, due to HG's.....but, if i were to get an OD pully and get a free flowing exhaust system, and run the same ammount of boost (15lbs or so) with free flowing, would it be just as bad for the HG's running 15 lbs with free flowing as it would running 15 lbs with stock exhaust?