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Old 03-31-2009, 08:20 PM
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mickmate mickmate is offline
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Join Date: Sep 2000
Location: Holderness, NH, US of A, NH
Cobra Make, Engine: CSX 4772 old iron FE
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Default Muffler replacement huge horsepower gains!

There was an article in Kit Car magazine before they went down the gurgler with the economy problems on installing new mufflers in Cobra side pipes. It came out at the time I was replacing some mufflers on an SPF. There has been some good discussions and threads on here already about the baseball shooting mufflers and resultant horsepower gains etc. In the absence of a good thread on how to actually install them I thought I would document what we are doing here as I'm doing several sets right now. It should be interesting to see these mufflers cut out, cut apart, measured and compared side by side. I will carry it through to the most fun part of these projects which will be testing them on the cars for noise and performance. As I said we have a few of these going through now but feel free to comment on any potential improvements or ask any questions as we go.
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