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I'm looking into a universal Magnaflow muffler to make a custom exhaust and was wondering if anyone knows whats the main difference (sound quality wise) between a Magnaflow Race series muffler and a Magnaflow Street Series muffler. Any info would be great. The only info I found was on their website. Thanks

 
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Don't know on that muffler, but most that say "Race" are straight through mufflers - the pipe goes straight through the muffler and has a few holes in it that dissapate sound into a surrounding fiberglass medium. Kinda like the old cherry bombs, except they flow a lot better.

 
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Thanks SMX. Anyone else have any info?