THUNDERHEADER™ X-SERIES™ for
2017 Harley-Davidson FLH Models
Available in Chrome or Black!
Our X-SERIES™ Exhaust is our newest line in creating maximum horsepower. With our 2" headpipe, equal length tubes, and a larger collector, this exhaust is made specifically for Harley-Davidson's Milwaukee-Eight™ engine. Come complete with full coverage heat shields and 12mm O2 sensor ports. Available in Chrome or Black.