Gardner-Westcott Exhaust Port Studs for 1966-Up Harley-Davidson Big Twin Sportster and Buell
Corroded or failed exhaust port studs allow hot gases to escape around the cylinder head, degrading performance and causing carbon buildup that accelerates damage to surrounding gaskets and mounting surfaces. Gardner-Westcott’s replacement studs restore proper header mounting with OEM-equivalent precision, eliminating leaks at the source.
Key Features
- Direct OEM-style replacement for Harley-Davidson exhaust port studs; replaces part number 16715-83
- Double-ended stud design with different thread specifications on each end for secure cylinder head mounting
- Sold as a pair of 2 studs
- Compatible with Harley-Davidson Evolution, Twin Cam, Sportster, Buell, and Shovelhead engine families
Technical Specifications
- Head-Side Thread: 5/16-18 x 7/8-inch
- Nut-Side Thread: 5/16-24 x 5/8-inch
- Overall Length: 1.7 inches
- Quantity: 2 studs (sold as a pair)
- OEM Cross-Reference: 16715-83
Fitment Notes
- Fits 1984-Up Big Twin Evolution and Twin Cam engines
- Fits 1986-Up Sportster and Buell models
- Fits 1966-1984 Shovelhead Big Twin engines
- Most engine configurations require 4 studs total – sold in pairs, order accordingly
- Review the Fitment tab for complete year and model breakdown
David Sprott –
These perfectly fit my 84 Harley-Davidson FXST evo engine
David Sprott –
I have an 84 Harley FXST can’t find exhaust systems to fit but these exhaust studs were a perfect replacement. Fast shipping and great product.
Michael Mayo –
The studs worked good.
Gabriel M. –
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Dwaine H. –
New hardware looks good