Hey Kev,
Its kinda wierd......Here in Michigan it can get cold and when i warm up my car for a little bit....The rasp goes away......but if you want get a (not sure what they call it) but High Flow resonator.....Magnaflow has a good one for about 70ish or so .........Talk to Stazi......in the SeMichigan Forum.......
-Mancho- cars name is Connie 99 Silver Frost SVT #1986 k&n filter with cut out box true duals w/ flows  Ground Controls with 17's mille miglia ... Hightower headlights 15.4 at 90.29 at Milan dragway before the true duals
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