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Old June 4th, 2016, 03:56 AM
Olboatanchors Olboatanchors is offline
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Location: Puyallup, WA
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Default Re: Exhaust or headers

I'm gonna follow this one. I've been thinking about building a set. Have you checked out http://www.headersbyed.com/hc_buildbetter.htm ? They don't sell flanges for the GMC 6's but there's some good info there.

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