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Re: wtb exhaust manifolds
I also have a set of manifolds that came off my '73 307 squarebody that have AIR tubes. I have another set of manifolds that came off a '90 Impala/ Cadillac that have AIR tubes but are much different design-wise. Those manifolds have more of an upswept design.
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M (sold)
1997 K2500 Chev. EC 7.4L/ 4L80E
2018 Dodge Ram 2500 HD R/C
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