Thread: Muffler replacement huge horsepower gains!
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Old 06-29-2009, 04:26 PM
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Dwight Dwight is offline
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Join Date: May 2001
Location: Florence, AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
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Smile Classic Cobra mufflers
I changed my mufflers last winter from 2 1/2" x 24" Lone Star mufflers to 3" x 28" COBRAPACK MUFFLER. My 302/354 dyno'ed at 402 rwhp 416 rwtq. I do not know how much I gained with the new muffler because I changed heads, cam, intake, TB, mass air, etc.
But I love the sound, loud but not to loud. I can cruise at 70 and talk to the passenger. I could not do that with to old mufflers. Nice deep rumble.

I highly recommend the Classic Cobrapack mufflers.

www.classicchambered.com/

Dwight
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