Xtreme Marine Seal Intake Gasket - Big Block Chevy 454/502 Rectangular Port 

Xtreme Marine™ Seal Intake Gasket -Big Block Chevy 454/502 Rectangular Port- Sold in Pairs

These hi-performance intake manifold gasket sets are manufactured using the latest in synthetic fiber nitrile materials. This material is designed without any metal core allowing engine builders the option of port trimming for modified ports. These gaskets resist oil, gasoline, and even alcohol. A silicone sealing bead has been added to our Xtreme Marine Seal Gaskets for an additional sealing bead around ports where it's needed most on modified engines.

• Exceeds original equipment specifications
• Perfect for bi-metal applications (aluminum intake / cast iron blocks)
• Silicone beaded for a leak-proof seal

Note: These gaskets have a bolt hole provision above the intake ports. These generally only fit stock cylinder heads. Use 300-17342 for aftermarket cylinder heads without the bolt hole provision.

Sold in Pairs