Ported 3100/3400 Lower Intake

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Product Information

We offer 2 stages of porting, each with its own level of modification.  All of our manifolds are cleaned, baked, blasted, and inspected for cracks and warpage.  Stage 1 uses the stock large port 3100/3400 intake gaskets as a template.  Stage 2 uses the larger 3500 upper intake gasket, or the stock 3400 gaskets modified for the upper port.  Where our work differs from other companies is based on flowbench research.  We only use the gasket port sizes as a limit to porting, not a template to be matched.  Gasket matching improves the flow compared to stock, but will be outperformed by our higher flowing designs.  

Sportsman series lower intakes are sized where we want them and then blended to the rest of the runner.  Competition series are fully ported from both ends for the most flow possible from this intake manifold.  Gasket options are labeled for both Stage 1 (Full 3400) and Stage 2 (3500 upper, 3400 lower), with the Full 3400 set being the cheaper option for stage 2 if you want to cut the gasket to match the upper ports.

We use the metal lower intake gaskets with paper plenum gaskets for the full 3400 set, and an optional metal 3500 plenum gasket for stage 2 ported manifolds.  You can use the full 3400 gasket set on stage 2 if you cut the gasket to match the port.

Powdercoating is available in most colors.  Please use the additional info field to tell us what color if you choose this option.  We can have other parts coated as well if you would like, but it is difficult to put those options on this listing so please contact us if you would like more powder coating done.

Product CodeWOTLP3x00Lower

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