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Which Engines Have Raised Exhaust Ports?

Raised exhaust ports can affect header fitment and should be considered when selecting exhaust components.

Small Block Chevy (SBC)

All Small Block Chevy engines equipped with aluminum cylinder heads feature 0.500" raised exhaust ports.

Big Block Chevy (BBC)

All Big Block Chevy engines equipped with aluminum cylinder heads feature 0.300" raised exhaust ports.

Important Note

This specification is currently listed on the individual cylinder head pages but may not be displayed within the cylinder head information section of each engine listing. Customers should verify exhaust port height when selecting headers or other exhaust-related components.