There is an infinite number of exhaust manifolds, but I ASSUME you just mean for these trucks. To narrow it down to two, the two wheel drive trucks came with angled and the 4x4s with straight. Corvettes have the straight dumps as well. Some are 2" outlet some are 2.5" The trucks are 2" outlet, straight or curved.
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70 GMC 3/4 ton Sierra Grande 402/TH400
72 Jimmy 4WD 4spd 4" & 35's
64 Corvette Coupe
68 Camaro 'vert TPI & TH700
69 Z/28 355 12.6's @110
72 Datsun 240Z-ol' reliable
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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