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Anyone notice a MPG increase from Magnaflow catback?
Anyone noticed a MPG increase from installing a Magnaflow cat back? Found the v6 2.5" w/3" tip Magnaflow 15693 at an affordable price and might just order it. I read about the hp increase, and if it gives a MPG increase too, that might just convince me to order one.
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1998 Firebird Coupe
Mods: 3.73 Gears, Eaton TrueTrac, PCM Tune, LS1 Aluminum Drive Shaft, Cold Air Intake, 180 Thermostat, Magnaflow Cat-Back Exhaust, Moog LCA busings.
My Firebird Projects : Click Here
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