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Originally Posted by matt919
If your comparing a 3100 Pontiac engine with a 3.1 Multi-Port Chevy engine, they are different.. but.. "3.1" and "3100" mean the same thing.
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no.
A pontiac 3100 and chevy 3100 are the same, and pontiac 3.1 MPFI and chevy 3.1 MPFI are the same The are differences between the 3.1 MPFI and the 3100, such as improved heads and intake plenum.
3100:
3.1 MPFI:
