I have heard C&L has fixed there issues. I just got rid of my 75mm Pro-M and got the 76mm C&L kit with discharge tube, but like 93GT it isn't here yet.
www.cnlperformance.com they have a good article on it, good pictures also.
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My Ride Check Out My Site 91GT, Holley SysteMAX II Kit-Heads 2.02" x 1.60",Full MAC exhaust 1-5/8" Long tubes, 2-1/2" O.R H-Pipe, 2 1/2" cat back, 12" K&N Filter, RNH PERFORMANCE Ram Air, Ron Davis Radiator, Full Suspension,3:73's, Welds, Best on new motor-12.60 @ 108, no traction 1.98