Join Date: Jun 1999
Location: Ewing, NJ 08560
Re: Which Exhaust, 2.5 or 3
The louder it sounds at idle usually means it's very obnoxious inside while cruising around. I tried the V-Force 3" chambered mufflers(similar to Flowmasters) on my 70 SS396 and it was insane, way too loud with horrible resonance. I swapped them out for the Summit 3" super turbos and it sounded healthy at idle but you could talk to someone in the car with the windows down while cruising at 65 mph. You probably only need 2.5" so try swapping out mufflers first, but when you run full tailpipes it will always sound quieter up in the driver's seat.
69 Z28 Hugger Orange original factory JL8 brakes, being restored
09 Z71 daily beater