LS1 5.7L Intake Manifold

The General Motors 12556333 is an OEM intake manifold specifically designed for LS1 5.7L engines found in 1997-2004 Chevrolet C5 Corvette models. This genuine GM part was removed from a low-mileage vehicle (approximately 30,000 miles) that had undergone performance modifications, making the original factory components available. As an OEM component, this intake manifold is manufactured to factory specifications, ensuring direct fit and performance. It is compatible with cathedral port heads and is suitable for all LS1, LS2, and LS6 motors. It is important to note that this manifold is an LS1 intake and may represent a performance downgrade compared to LS6 or LS2 intakes. The part number 12556333 is confirmed for 1997-2000 LS1 intakes, distinguishing it from the LS6 intake which uses part number 12573572. This particular unit is for non-EGR applications. Buyers are encouraged to compare the provided images to their current manifold to confirm it is the correct part for their needs.