Cometic Evo Sportster EST Gasket Kit - Oe#17026-91a — Harley-Davidson Sportster 883, Sportster 883 Deluxe, Sportster 883 Hugger (1986-1990)

Cometic Evo Sportster EST gasket kit with OE# 17026-91a, containing every gasket, seal, washer, and o-ring needed for a complete engine overhaul. Features MLS head gaskets, steel Viton-coated base gaskets, and Cometic's Extreme Sealing Technology for reliable compression and leak prevention.

Features

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

Specifications

• Brand: Cometic
• Manufacturer Part #: C9764
• OE Number: 17026-91a
• Weight: 0.42 lbs

Fitment

Fits Harley-Davidson Evo Sportster 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.

What is EST technology?

Extreme Sealing Technology — Cometic's design and material approach to prevent leaks and maintain compression in high-performance V-Twin engines.

Will this fit my year Evo Sportster?

This kit is designed for Evo Sportster models. Verify the OE number 17026-91a matches your bike's factory documentation before ordering.

Do I need any other gaskets if I buy this kit?

No — this is a complete motor kit with every gasket and seal required for a full engine overhaul.