Thread: Muffler replacement huge horsepower gains!
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Old 04-15-2009, 06:05 PM
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CobraEd CobraEd is offline
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Location: Northern VA, VA
Cobra Make, Engine: Classic Roadsters
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I have stainless steel glasspacks that I had Lucien Donofro of Arizona Exhaust make up for me about 7 years ago. 4" outer diameter, 3" inner diameter. Louvers facing backward. From the time I put them on I noticed a SIGNIFICANT increase in power, but upon any deceleration of engine RPM, you get the sound like papper fluttering in the wind at the outlets.


Who cares.


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