Valley Plate Assembly, 18° Cylinder Heads


  • Universal aluminum valley plate for 18° cylinder heads
  • Cast-in integral passages equalize coolant flow from front to rear of heads
  • For heads dated June 1996 and after
  • Can be used with dedicated 2-piece manifold spiders, existing 1-piece intake manifolds which have been properly machined, or fabricated designs
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SKU: 24502654 Categories: ,

Valley Plate Assembly

P/N 24502654

Universal aluminum valley plate is designed for use with 18° cylinder heads
– Can be used with dedicated 2-piece manifold spiders, existing 1-piece intake manifolds which have been properly machined for use as a dry manifold, or fabricated manifold designs
– Valley plate has cast-in integral passages to equalize coolant flow from the front and the rear of the cylinder heads
– Fits heads dated June 1996 and later

Additional Required Components: (1) 10185007 gasket

Engine Application: 18? high-port racing heads

Note: Important information about gasket matching: Gasket flanges are machined to provide the proper port alignment with standard runner locations. Runners in heads and manifold must be matched by engine builder. Often, the gasket will line up with the top of the port so removal is required at the bottom of the port. Gaskets that can be used with this manifold are: Fel-Pro® P/N 1205 and 1206, and Mr. Gasket® P/N 102. Always match the gasket to the cylinder head you plan to use to ensure a correct fit.


Valley Plate Assembly

24502654 Chevrolet Intake Manifold Component

For 18ᄚ Cylinder Heads

Intake manifolds distribute the air/fuel mixture to the appropriate cylinders. Intake manifold design is geared toward the end usage, whether that is a street performance engine or an all-out competition application. The wide range of Chevrolet Performance intake manifolds means there is an ideal manifold for your every need. There are cast-iron and aluminum intake manifolds for carbureted and fuel injected applications. Chevrolet Performance intake manifolds were designed specifically for GM engines, so you know they will deliver O.E. performance.

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to