COMETIC - C10377 - Head Gasket - 4.250" - .040" - Center Cooled - MLS
The COMETIC C10377 Head Gasket is a pair of MLX (Multi-Layer-Xtreme) gaskets with a 4.250" bore sized for 2023-2025 Harley-Davidson Road Glide (Police FLTRXP, Custom FLTRX) and Street Glide EFI (FLHX) models, featuring an extra stopper fold-over layer and proprietary high-temperature coatings to handle turbo, high-compression, and power-adding modifications — made in the USA.
Features
- High-quality products for long-term reliability
- Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle
- MLX Gasket (Multi-Layer-Xtreme) features an extra “stopper” fold-over layer providing a torque limiting surface that prevents yielding of the combustion seal
- MLX head gaskets are essential for all M-Eight applications using a turbo, high compression, nitrous or any power adding modifications
- Proprietary high-temperature coatings along with embossments provide a micro seal for fluids against the head and block surface
- Multi-Layer Steel (MLS) gasket features two outer Viton®-coated embossed spring steel layers with an inner steel layer to provide additional support
- Made in the USA
Specs
- Material: MLS (Multi-layer Steel)
- Units: Pair
- Bore Size: 4.250"
- Product Name: Gasket
- Riding Style: Street
- Thickness: 0.040"
- Thickness: 1.02 mm
- Type: Cylinder Head
Frequently Asked Questions - COMETIC - C10377 - Head Gasket - 4.250" - .040" - Center Cooled - MLS - '23-'25 Harley-Davidson
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
