Cometic Twin Cam EST Gasket Kit — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Softail (1999-2006)

Cometic Twin Cam EST gasket kit contains every gasket, seal, washer, and o-ring needed for a complete engine overhaul on Twin Cam-equipped V-twins. Features MLS head gaskets, steel Viton-coated base gaskets, and blue Viton valve stem seals engineered for modern high-performance engines.

Features

• MLS head gaskets
• Steel Viton-coated base gaskets
• Blue Viton valve stem seals
• AFM material components
• Complete overhaul kit — all gaskets and seals included

Specifications

• Brand: Cometic
• Manufacturer Part #: C9777F
• Length: 13.3 in
• Width: 22.9 in
• Height: 2 in
• Weight: 1.86 lbs

Fitment

Fits V-twin motorcycles with Twin Cam EST engines, including Harley-Davidson models.

Frequently Asked Questions

What's included in this gasket kit?

Every gasket, seal, washer, and o-ring needed for a complete engine overhaul — head gaskets, base gaskets, valve stem seals, and more.

Will this fit my specific Harley model?

This kit is designed for Twin Cam EST engines. Verify your engine code matches EST before ordering to ensure compatibility.

Are these OEM Harley gaskets or aftermarket?

Cometic manufactures these as premium aftermarket replacements using MLS and Viton materials that meet or exceed OEM specs.

Do I need any additional seals or gaskets beyond what's in the kit?

The kit is designed as a complete overhaul set, but always consult your service manual to confirm all components are included for your specific model.