Thunderheader FXR
Patented Anti-Reversion design that produces maximum HP without sacrificing low end torque. Complete with all hardware needed to mount. Heat shields sold separately (set of 3 part...
Thunderheader Heat Shields Dyna and FXR
Matching heat shields for you Thunderheader Exhaust system.
Current lead time is up to 16 weeks on all Thunderheader Racing Products, we do not stock them.
Thunderheader Touring
Designed to give maximum horsepower without sacrificing low-end torque
2-into-1 systems with patented collector design that directs spent exhaust gases in a spiral motion thr...
Thunderheader X Series
The new THUNDERHEADER X-SERIES for Touring is our large diameter exhaust specifically designed for big cubic inch engines (107" and larger), built to produce big numbers. The...
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