Cometic C4312-051 MLS Head Gasket .051in 88mm for 2002-2007 Honda/Acura K20/K24

Vehicle Fitment

• 2002-2007 Acura RSX (Base, Type-S), 2003-2007 Honda Accord (DX, LX, EX, SE, EX-L/Value Package/Special), 2002-2005 Honda Civic Si, 2003-2007 Honda CR-V (LX, EX, SE), 2003-2011 Honda Element (DX, EX, LX, SC) - all with K20A1, K20A2, K20A3, K20Z1, K24A1, K24A4, K24A8 DOHC 2.0L / 2.4L engines

Fitment Notes

• Does **not** fit K20C (turbo or newer "C-series" K-series) or other variants with different block or head geometry unless matching OEM K20/K24 dimensions exactly.
• Requires proper head and block preparation - flat, clean surfaces; OEM or better finish; correct bolt torque sequence. No retorquing needed per Cometic spec.
• 2025 fitment unconfirmed; fitment is confirmed through 2011 for Element, 2007 for most Accord/RSX/Civic/CR-V models listed.

Features

• Multi-Layer Steel (MLS) construction for maximum sealing performance under high pressure and thermal cycling. :contentReference[oaicite:0]{index=0}
• Outer stainless steel layers embossed and coated with Viton rubber on both sides for heat & chemical resistance up to ~250 °C (482 °F). :contentReference[oaicite:1]{index=1}
• 3-layer steel design including a central shim/uncoated stainless layer to control thickness and maintain strength. :contentReference[oaicite:2]{index=2}
• Bore diameter 88.00 mm matching Honda/Acura K20/K24 standard OEM specification. :contentReference[oaicite:3]{index=3}
• Compressed thickness .051 inches (~1.30 mm), offering more deck clearance while maintaining good sealing. :contentReference[oaicite:4]{index=4}
• No sealants required; gasket designed to seal dry when surfaces properly prepared. :contentReference[oaicite:5]{index=5}
• Capable of handling both aluminum-head to aluminum-block or aluminum-head to cast-iron block combinations without losing sealing integrity. :contentReference[oaicite:6]{index=6}
• Designed to resist distortion under high cylinder pressures and maintain clamp load through engine heat cycles. :contentReference[oaicite:7]{index=7}

Specifications

• Bore Size: 88.00 mm :contentReference[oaicite:8]{index=8}
• Compressed Operating Thickness: .051 in (≈ 1.30 mm) :contentReference[oaicite:9]{index=9}
• Material: Stainless Steel MLS (3-layer), with outer Viton coating :contentReference[oaicite:10]{index=10}
• Engine Compatibility: K20A1, K20A2, K20A3, K20Z1, K24A1, K24A4, K24A8 - 2.0L / 2.4L DOHC inline-4 engines :contentReference[oaicite:11]{index=11}
• Position: Cylinder head gasket (head-to-block interface) covering all cylinders in the head. :contentReference[oaicite:12]{index=12}
• Layer Count: 3 layers of stainless steel (outer embossed & coated; center shim) :contentReference[oaicite:13]{index=13}
• Requires clean, flat mating surfaces; no retorquing; OEM torque sequence and specifications. :contentReference[oaicite:14]{index=14}
• Fitment confirmed through 2011 for some models, through 2007 for most; 2025 unconfirmed. :contentReference[oaicite:15]{index=15}

Included Components

• 1x Cometic MLS Head Gasket C4312-051

Product Description

The Cometic C4312-051 is a high-performance Multi-Layer Steel (MLS) head gasket designed for Honda/Acura's K20/K24 DOHC 2.0L and 2.4L engine families. With an OEM-matching bore of 88.00 mm and a compressed thickness of .051 inches (~1.30 mm), it provides more deck clearance compared to thinner gaskets, useful in situations such as mild over-bore work, head resurfacing, or when reducing compression. The gasket features embossed outer stainless steel layers with Viton rubber coating both sides to resist high heat, chemical exposure, and maintain sealing under thermal and mechanical stress.

Fitment is confirmed for 2002-2007 models including Acura RSX (Base, Type-S), Honda Accord (DX, LX, EX, SE, EX-L/Value/Special), Civic Si, CR-V, and Element trims using compatible K20A1/K20A2/K20A3, K20Z1, K24A1/K24A4/K24A8 engines. The gasket does **not** fit newer K-series variants like K20C unless the block/head geometry matches the OEM K20/K24 specifications exactly. Installation requires flat, clean mating surfaces and proper bolt torqueing; no retorque required afterward. Fitment confirmed through 2011 for Element line; 2025 fitment unconfirmed.