Cometic Twin Cam EST Gasket Kit — Harley-Davidson Dyna Street Bob, Dyna Wide Glide, Dyna Fat Bob (2006-2017)

Cometic Twin Cam EST gasket kit for Harley-Davidson V-twin engines, containing all gaskets, seals, washers, and o-rings needed for a complete engine overhaul. Features MLS head gaskets, steel Viton-coated base gaskets, and blue Viton valve stem seals engineered for modern high-performance twin cam engines.

Features

• MLS head gaskets
• Steel Viton-coated base gaskets
• Blue Viton valve stem seals
• Complete gasket, seal, washer, and o-ring kit
• AFM material gaskets included

Specifications

• Brand: Cometic
• Manufacturer Part #: C9149
• Weight: 1.22 lbs

Fitment

Fits Harley-Davidson Twin Cam EST engines. Verify your engine code before ordering to ensure compatibility with your model year.

Frequently Asked Questions

What's included in this kit?

All gaskets, seals, washers, and o-rings needed for a complete engine overhaul — no additional components to source separately.

Will this fit my Twin Cam engine?

This is an EST-specific kit. Verify your engine designation (Twin Cam EST vs. other variants) on your bike's documentation before purchasing.

Are the head gaskets multi-layer steel (MLS)?

Yes — MLS construction with Viton coating for durability and reliable sealing on high-compression builds.

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

This is a complete overhaul kit. All necessary gaskets, seals, washers, and o-rings are included.