Description
Cometic Hybrid MLS Head Gasket – 0.030 in Thickness
The Cometic C4241-030 hybrid MLS head gasket is engineered for high-performance Honda builds that combine a VTEC cylinder head with a larger displacement block such as a B18 or B20. The hybrid multi-layer steel design blends the sealing durability of traditional MLS gaskets with additional features that help accommodate flange differences and combustion dynamics found in swapped or mixed applications. This gasket is ideal for high-output street, track, and race engines where reliable sealing under elevated cylinder pressures, heat cycling, and increased torque loads is critical.
Hybrid MLS construction uses multiple embossed stainless steel layers with a tailored sealing profile and elastomer enhancements to maintain consistent clamping force across the head and block flange. This improves resistance to combustion leaks, coolant seepage, and repeatability through many heat cycles when compared to standard composite or single-layer steel gaskets. At a compressed thickness of 0.030 inch, C4241-030 is often used to restore quench and maintain compression ratio in performance builds that have been decked or modified.
Replaces
This gasket is a performance replacement for OEM Honda head gaskets used in hybrid applications, including common part numbers such as 12251-P72-000 and equivalents used on VTEC-equipped B-series engines when paired with B18 or B20 blocks.
Fitment
Honda / Acura hybrid VTEC head applications including:
B18 head on B20 block
Other VTEC head combinations where a hybrid MLS gasket is required
Installation Notes
Hybrid MLS head gaskets require properly finished, flat cylinder head and block surfaces. Follow manufacturer torque specs and sequence. Use of quality head studs is recommended to achieve consistent clamping force and optimal sealing performance.
Part number
C4241-030
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