Thread: 350 for torque/mileage
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Old 01-03-2014, 12:33 AM   #20
1972GMCsierra4x4
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Join Date: Feb 2013
Location: Winchester Kansas
Posts: 145
Re: 350 for torque/mileage
Lol on the open headers. Straight pipes with factory manifolds were bad enough!

As for the primaries, I wanna say that they're 1 3/8" or 1 1/2". I can't remember right off the top of my head
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