Overview

ICT Billet LS Truck Intake Port Adapters

ICT Billet LS truck intake port adapters are precision CNC-machined aerospace-grade 6061-T6 billet aluminum plates that allow you to mix and match different generations of GM LS cylinder heads and intake manifolds. Because GM manufactured LS engines with two primary intake port shapes—cathedral port and rectangle port—these adapters bridge the gap so mismatched parts can bolt together seamlessly.

Why are they used?

* Cross-generation swapping: The adapters are most commonly used to bolt a rectangle port intake (like an LS3/L92) onto an older cathedral port cylinder head (like an LS1/LS2/LS6)
* Supercharger upgrades: They allow truck builders or LS1/LS6 owners to mount power adders like the LSA supercharger (found on the CTS-V/Camaro ZL1) directly to standard cathedral port heads
* Budget performance: Builders can use larger, higher-flowing aftermarket or factory rectangle port intakes on older truck engines without needing to swap the cylinder heads

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