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Re: 57 GMC, frame swap, 4wd, 454 big block, 4 speed
Quote:
Originally Posted by OutlawDrifter
Their 5x11x22" case mufflers have always done a good job quieting things down for me. I've never messed with the chambered Magnaflows.
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I haven't either. I did a lot of reading on them and listening to youtube videos. Hopefully it sounds ok. If not, it's not a big issue to change out the muffler later.
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