Cometic Subaru 89.5mm Bore .032in MLX Head Gasket - Left Subaru WRX 2015-2021 | C4954-032

Product Fitment: 

2015-2021 Subaru WRX

The Cometic MLX Head Gasket C4954‑032 is engineered for high performance and reliability in the Subaru FA20 (VA‑series WRX) engines. Built with a multi‑layer steel (MLX) construction, this head gasket provides excellent sealing under extreme temperatures and pressures, with a built‑in “stopper” layer to maintain integrity without distortion.

Key Features & Benefits

• MLX (Multi‑Layer Stopper) design — Combines the strength of MLS-style gaskets with an integrated combustion sealing stopper layer

• 0.032″ compressed thickness — Precise tolerance for reliable sealing and consistent performance

• Three layers of steel/fiber laminate material — Helps seal irregular surfaces and deal with thermal expansion

• No sealants or re‑torque needed — Simplifies installation and reduces error risk

• High temperature performance — Withstands race-level conditions, ideal for tuned or high-stress builds

• Left head side (driver’s side in many layouts) — Be sure to match side (you’ll also need the matching right side gasket, e.g., C4955‑032 variant)

Specifications

Installation & Usage Notes

• Ensure both head and block deck surfaces are clean, true, and within spec before installation.

• Use correct torque sequence and final torque specs prescribed for your engine.

• Since this gasket is “no re‑torque / no sealant,” don’t add extra coatings or adhesives unless recommended by your machine shop.

• Always match left/right sides properly — the orientation matters.

• If running high boost or aggressive tuning, inspect after initial use to confirm proper sealing.