James Gasket Air Injection System
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About James Gaskets Inc.
James Gaskets Inc. has been setting the benchmark for gasket quality in the Harley-Davidson world since 1979. Founded by enthusiast James Clark after he grew frustrated with the sealing technology available at the time, the brand was built on a single, straightforward mission: engineer gaskets and seals that simply do not leak. Over four decades later, that commitment to precision engineering has made James Gaskets one of the most recognized names among Harley owners, professional mechanics, and custom builders worldwide.
A Legacy Built on Sealing Technology
What separates James Gaskets from the competition is a relentless focus on material science and fitment accuracy. Their gaskets and seals are manufactured from carefully selected materials — including coated composites, SAE 1010 steel bonded with oil-resistant rubber, and precision-cut foamet — each chosen to match the thermal and mechanical demands of specific engine locations. A proprietary release coating on many products also makes disassembly cleaner, a small but meaningful detail that any mechanic who has wrestled with a stuck gasket will appreciate.
The brand's catalog spans virtually every sealing point on a Harley-Davidson engine and drivetrain. Their comprehensive engine gasket sets are a go-to choice for full rebuilds, bundling together cylinder head gaskets, rocker box gaskets, cylinder base gaskets, and more into a single convenient kit. Mechanics value these sets for their consistent fitment and the assurance that every gasket in the package was engineered as a system, not an afterthought.
From Rebuilds to Conversions
James Gaskets also supports builders tackling more ambitious projects. Their engine conversion gasket sets address the unique sealing challenges that arise when swapping or upgrading powerplants — a scenario common in the custom Harley community. For those working around the oiling and drivetrain systems, the brand offers reliable automatic transmission oil pan gaskets designed to maintain a leak-free seal under the stress of heat cycling and vibration.
Rounding out the lineup, James Gaskets produces an extensive range of engine cover gaskets — including cam cover, rocker cover, primary cover, and inspection cover gaskets — covering the full perimeter of the Harley engine. Whether you're chasing a persistent seep or performing a show-quality restoration, there's a James Gaskets part engineered specifically for the job.
Why Riders and Mechanics Trust James Gaskets
- Over 45 years of dedicated Harley-Davidson gasket manufacturing expertise
- Products made in the USA using premium, application-specific materials
- Comprehensive coverage across engine, primary, transmission, and drivetrain sealing points
- Designed for both stock restorations and high-performance custom builds
- Consistently praised for precise fitment and long-lasting seal integrity
From a weekend wrench-turner doing their first top-end rebuild to a seasoned shop building custom billet motors, James Gaskets offers a trusted, purpose-built solution for every sealing need on the Harley-Davidson platform.