Special Offers
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Thunderheader™ X-SERIES™ M8 Softail 2-In-1 Exhaust – Chrome (25' - 26')
Our X-SERIES™ Exhaust is our newest line in creating maximum horsepower. With our 2″ head pipes, equal length tubes, and a larger collector, this exhaust is made specifically for Harley-Davidson’s Milwaukee-Eight™ engine. Includes full coverage heat...Regular price $1,899.00Regular price $1,899.00 -
Thunderheader™ X-SERIES™ M8 Softail 2-In-1 Exhaust – Chrome (18' - 26')
The Thunderheader™ X-SERIES™ Exhaust is their newest line in creating maximum horsepower. With 2″ head pipes, equal length tubes, and a larger collector, this exhaust is made specifically for Harley-Davidson’s Milwaukee-Eight™ engine. Includes full coverage heat shields....Regular price $1,899.00Regular price $1,899.00 -
Thunderheader™ Shovelhead Exhaust – Black (70' - 83')
Thunderheader's Famous 1020B Custom Exhaust model! Features the 1020B design by Thunderheader. Fits all Shovelhead models without floorboards, Years 1970 - 1983 (Does not fit kickstart) Heatshields sold separately.Regular price From $999.00Regular price From $999.00 -
Thunderheader™ Shovelhead Exhaust – Chrome (70' - 83')
The Famous 1020 Model is back in production! Features Thunderheader's patented designs, the 1020 Model Fits 1970 - 1983 Shovelheads. Includes an all-new bracket, clamp, and all hardware to mount the exhaust. Heat shields sold separately....Regular price From $1,079.00Regular price From $1,079.00 -
Thunderheader™ FXR – Fits Models W/ Floorboards Only - Black (84' - 86')
The famous 1018B is back in production! With an all new bracket design, the Thunderheader™ 1018B Model Fits 1984 – 1986 FXR’s. Features 1 3/4″ head pipes to our patented megaphone muffler design. Includes an all...Regular price $999.00Regular price $999.00 -
Thunderheader™ FXR – Fits Models W/ Floorboards Only – Black (87' - 26')
The famous 1019B is back in production! With an all new bracket design, the Thunderheader™ 1019B Model Fits 1987 – UP FXRs. Features 1 3/4″ head pipes to our patented megaphone muffler design. Includes an all...Regular price $999.00Regular price $999.00
Stock powerplants leave crucial horsepower on the table. Upgrade your motor with high-flow air intakes, performance carburetors, high-lift camshafts, and complete big bore kits engineered for brutal low-end torque and high-RPM power. Seal up your cases, dial in your air-fuel mixture, and keep your engine screaming down the pavement.