The Chevrolet Performance exhaust header and manifold gasket is a D-port, multi-layer steel gasket for GM LS-Series engines with D-port exhaust such as the LS7. Sold individually.
Specifications:
- Exhaust Header / Manifold Gasket
- D Port
- Multi-Layer Steel
- Sold individually (each)
- Part number: 12594171
Applications:
- GM LS-Series engines with D-port exhaust (LS7)
FAQ
What port shape does this gasket fit?
It is a D-port gasket for LS-Series heads with D-shaped exhaust ports.
What type of gasket is it?
It is a multi-layer steel header and manifold gasket.
What engines does it fit?
It fits GM LS-Series engines with D-port exhaust such as the LS7.

