Long Runner Intake Manifold

What Does This Do?

The intake manifold is the large aluminum piece that sits on top of the engine and distributes air to each cylinder. Holley's long-runner design uses longer intake passages that improve airflow velocity at low-to-mid RPM — this is where you feel the most difference on the street. Benefits: 15-25 HP gain with a tune, stronger mid-range torque (where you drive 90% of the time), the extra plenum volume supports future forced induction builds. The cast aluminum construction is significantly lighter than the factory composite manifold. Trade-offs: gains require a tune to be fully realized (hence the requiresTune flag). The manifold itself is expensive, and professional installation is recommended due to coolant line routing and proper gasket sealing. This is a mid-to-advanced mod — install it after you've already done intake, exhaust, and headers. On a stock engine, the factory manifold isn't a meaningful restriction. This shines on cammed or boosted builds where the factory manifold becomes the bottleneck.