Genuine James Harley Cylinder Base Gasket – 84-99 Big Twins & 86-15 XL Sportster – BC38354 T

Alright Harley riders and builders—if you're doing top end work on a Big Twin from 1984-1999 or an XL/Sportster from 1986-2015, you need a solid base gasket, and this is the one.

It's a genuine James Gaskets cylinder base gasket, made in the USA, and it's a direct replacement for OEM part numbers 16774-86D, 16789-04, and 920860.

James gaskets are known for quality—they seal right and hold up to the heat and vibration these V-twins throw at them.

This is a new, classic part intended for replacement use, so whether you're rebuilding or just fixing a leak, you're getting the good stuff.

It fits both Big Twins and Sportsters in those year ranges, so it's versatile.

Don't skimp on gaskets—a leak here can cause major problems down the road.

Get the genuine James gasket and do the job once, right.

Made in the USA, so you know it's legit.

So if you're in the middle of a build or just doing maintenance, grab this gasket and button it up with confidence.

Questions about fitment?

Hit us up—we're here to help you keep that Harley on the road.