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Engines and Components› Cylinder Heads and Components

Chevrolet Performance

LS9 CNC-Ported Cylinder Head Assembly

$1,359.13 $1,253.80 Save $105.33

SKU: 19433498

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Description

The Chevrolet Performance LS9 CNC-Ported Cylinder Head Assembly is engineered to significantly boost airflow and performance for LS engines. This assembly is a CNC-ported version of the renowned LS9 cylinder head, designed to deliver approximately 10% more flow than the stock head. It achieves this with substantial intake runners at 276cc and exhaust ports at 92cc, paired with large 2.165-inch intake valves and 1.590-inch exhaust valves. The head is constructed from durable cast aluminum and features D-shaped exhaust ports for optimal scavenging.

MIA's Description

The Chevrolet Performance LS9 CNC-Ported Cylinder Head Assembly is a performance cylinder head designed to enhance engine output. This assembly features CNC-ported versions of the LS9 cylinder head, offering improved airflow over the production model. It boasts 276cc intake runners and 92cc exhaust ports, with intake valves measuring 2.165 inches and exhaust valves measuring 1.590 inches.

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Specifications

BrandChevrolet Performance
Part Number19433498
CategoryEngines and Components

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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