I have a flowmaster 80 series catback kit(american thunder) on the car now 3" in, 3" dual out, still have a cat but after market better flowing, and i get a hollow popping some about 2800 3200 every time i shift to any gear,I hhate it is it the flowmaster or should i go magna flow i know the magna flow in better for performance but will i have the same popping problem???? what are you guy running and what are your pros and cons of the different mufflers??????? ALso does the magnaflow have the hermonices that all flow master mufflers have????

 

I had the 3" magnaflow on my 1996 Z, and needless to say i wasnt happy. It was just a little bit too quite for me, but I dont think Ive ever heard of an f-body that didnt have the "cracking" noise after the rpms drop... good luck, stay away from magna-slow lol go with SLP loudmouth!

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