Cometic B-Series Exhaust Header Gasket

Description

Cometic B-Series MLS Exhaust Manifold Gasket – 0.030 in Thickness

The Cometic C4151-030 is a multi-layer steel (MLS) exhaust manifold gasket designed for Honda B-series engines. Compared to common composite or graphite-style gaskets, MLS construction is far more resistant to heat cycling, blowout, and gasket “push-out” under sustained high temperature and vibration. It’s an ideal upgrade for street and track cars running aftermarket headers or higher exhaust heat, where long-term sealing matters.

This gasket uses an embossed multi-layer steel design to maintain clamping load across the flange, helping prevent exhaust leaks that can cause ticking, soot marks, and warped sealing surfaces over time. No sealants are required when installed on clean, flat mating surfaces.

Fitment
Honda / Acura B-series applications including B16, B17, B18, and B20 VTEC and non-VTEC variants using the matching B-series exhaust manifold/header flange pattern.

Part number
C4151-030

Factory part number it replaces:
18115-P30-013