Stay away from Flowcloggers, they are only slowing you down.Dynomax or MAC are my opinion. I had Flowmaster on my car and it went 11.2@123mph. With just a change in mufflers to Dynomax racemagnums,the car went
the best of 10.9@125mph.
It's your choice,but I would stay away!!!
Good Luck
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88 NOTCH DSS 331CI C-4 BRAKE 4:10'S 11.5-1 DART IRON HEADS X-CAM 1.7 ROCKERS 8PT. CAGE BEST 10.9@125MPH 100% STREETALBE TO ME!!!