Exhaust TECH Mufflers, Headers and Pipes Issues

          
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Old 11-20-2008, 05:44 PM
twobirds twobirds is offline
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Join Date: Jul 2005
Location: brighton mich.
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Question can someone tell me what kind of exhaust manifolds i have.??

I just bought a 76 trans am 455 4 speed about a month ago,and the exhaust manifold look like ram air ,but i dont know what they came off or what year they are, here is the the casting # 478140-1 any ideas.? and why is there only 3 bolts that hold each manifold on.?

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Old 11-24-2008, 10:47 PM
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1971WARBIRD 1971WARBIRD is offline
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okay,book says 478140 is 1970 RAIII left side GTO/FIREBIRD manifold.

now the 478141 1970 RAIV-HO455 left side GTO/FIREBIRD manifold.

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