I had the Summit 3" turbo mufflers on the SS396. They sounded great with a nice rumble but not too loud to talk in the car while on the highway with the windows open. It felt like the car picked up a lot of power going from the 2-1/4 to the 3" dual exhaust. I think the Summit mufflers are Dynomax.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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