LT1-LT4 Modifications 1993-97 Gen II Small Block V8

95 LT1 exhaust manifold bolt size

Old 05-12-2013, 05:21 PM
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Default 95 LT1 exhaust manifold bolt size

Putting exhaust manifold on the drivers side after porting both heads. I lost an upper AND lower bolt for the exhaust manifold and the auto parts stores don't have anyone, I only need TWO, so I'm going to the hardware store, what size are these bolts?
Old 05-12-2013, 05:37 PM
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IIRC, the thread is 5/16-18. The length will depend on the thickness of the manifold.
Old 05-12-2013, 05:42 PM
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3/8” 16 thread
Old 05-12-2013, 06:32 PM
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Originally Posted by Evil Opti
3/8” 16 thread
^^this. About 1-3/16 long. (note that some spacers were used on some bolt locations)


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