Cometic Top End Gasket Kit For Harley EVO 1984-1991
Engine Refresh: Cometic Top End Gasket Kit for Harley EVO Big Twin (1984–1991)
The Cometic Top End Gasket Kit is the premier choice for riders performing a full top-end rebuild, cylinder head service, or Big Bore Upgrade on their early model Harley-Davidson Evolution (EVO) Big Twin engine, specifically covering the 1984–1991 model years. This kit provides a complete set of gaskets and seals necessary to reseal the cylinder heads, cylinders, and rocker boxes with materials engineered for superior durability.
MLS Technology for Uncompromising Reliability
Cometic Gasket is an industry leader, renowned for utilizing advanced materials to combat high heat and pressure—a necessity for any performance or rebuilt V-Twin engine.
Multi-Layer Steel (MLS) Head Gaskets: The cornerstone of this kit is the inclusion of MLS Head Gaskets. Unlike older, single-layer composite gaskets prone to failure, MLS gaskets are comprised of multiple layers of embossed steel. This construction provides an exceptional, dynamic seal that is highly resilient to the flexing and heat inherent in a rebuilt engine, making it the superior Harley EVO Head Gaskets 1984-1991 choice. They are mandatory for any high-compression or performance Evolution Big Twin Top End Reseal.
Aramid Fiber Base Gaskets: Cylinder base gaskets are often constructed from durable aramid fiber composite material, ensuring a solid, leak-free seal between the cylinder and crankcase, even under high-temperature conditions.
Viton Valve Seals: Includes high-quality Viton rubber valve stem seals, critical for controlling oil consumption and maintaining consistent engine vacuum.
Complete Coverage for Top-End Service
This Cometic Top End Gasket Kit EVO is designed to provide full sealing coverage for the entire upper end of the 1984–1991 EVO Big Twin engine, which is ideal for a Harley EVO Big Twin Rebuild Kit.
Cylinder Head Gaskets (MLS): Ensures maximum compression and leak prevention.
Cylinder Base Gaskets: Seals the cylinder deck to the crankcase.
Rocker Box Gaskets: Upper, lower, and middle gaskets for the rocker arm covers, often incorporating silicone beads for superior oil control.
Intake Manifold Seals: Seals the intake manifold to the heads.
Exhaust Gaskets: High-temperature exhaust port seals.
Viton Valve Stem Seals and Pushrod Tube Seals are all included.
By choosing the Cometic Top End Gasket Kit, you are investing in American-made precision and advanced sealing technology, ensuring that your classic EVO engine maintains maximum performance and reliability after your service.
Cometic Top End Gasket Kit For Harley
Features:
EST gasket kits contain MLS head gaskets, steel Viton coated base gaskets, blue Viton valve stem seals and AFM material
Other features include the race style exhaust gasket, that won’t fray into the port, and the one piece Evolution rocker box base gasket which is made from a single layer of .020″ thick embossed Viton coated steel
EST kits are available in complete motor kits and top end kits
EST kits are made for any builder who demands the best and appreciates the long-term value for his/her dollar
| Product Style | AmericanV-twin Item # | Catalog Number | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|---|
| 3-5/8″ Bore | 10226055 | 173-720 | C9767 | In Stock: Ships within 24 hours | |
| Std Bore | 10225885 | 434-056 | 227884 | C9747 | In Stock: Ships within 24 hours |
| Std Bore / .030″ Head Gaskets | 10225860 | 603-116 | 227879 | C9851 | In Stock: Ships within 24 hours |
This Product Fits
Harley Davidson
Dyna Glide Sturgis FXDB-S 1991
Electra Glide Classic FLHTC/I 1985-1991
Electra Glide Sport FLHS 1987, 1988, 1989, 1990, 1991
Electra Glide Standard FLHT/I 1985-1991
Electra Glide Ultra Classic FLHTCU/I 1989, 1990, 1991
Fat Bob FXEF 1985
FLH 1985
Low Glide/Low Rider FXRS 1985-1991
Low Rider Chrome FXRC 1985, 1986, 1987, 1988
Low Rider Custom FXLR 1987, 1988, 1989, 1990, 1991
Low Rider Sport FXRS-SP 1987, 1988, 1989, 1990, 1991
Softail Custom FXSTC/I 1986-1991
Softail Fat Boy FLSTF/I 1990, 1991
Softail Heritage Classic FLSTC/I 1987, 1988, 1989, 1990, 1991
Softail Heritage FLST/I 1986, 1987, 1988, 1989, 1990
Softail Springer FXSTS/I 1988, 1989, 1990, 1991
Softail Standard FXST/I 1984-1990
Sport Glide FXRT 1985-1991
Sport Glide Grand Touring FXRD 1986
Super Glide FXE 1985
Super Glide FXR 1986-1991
Tour Glide Classic FLTC/I 1985-1991
Tour Glide FLT 1985, 1986
Tour Glide Ultra Classic FLTCU/I 1989, 1990, 1991
Wide Glide FXWG 1985, 1986
