Ramjet's has been selling Thunderheaders for nearly 30 years! Shortly after being introduced to the market in the late '80s, Thunderheader 2:1 exhaust systems became THE performance exhaust system for your Harley-Davidson. Between the unmistakable Thunderheader sound to its seat of the pants, dyno-proven performance gains, and its iconic look, a Thunderheader is always an excellent choice!
Thunderheader head pipes are tuned to the proper length and diameter to produce maximum horsepower and an excellent torque curve. With a patented collector design, only Thunderheader systems can produce their power, torque, and sound. The collector directs spent gases through acoustical dampening chambers, which creates a spiral motion upon exiting the pipes. This also creates an anti-reversion trap to minimize the amount of air rushing back in.
PLEASE READ NOTES BELOW CONCERNING AVAILABILITY AND LEAD TIMES.
- Commonly Recognized As The BEST Sounding Exhaust For Harley-Davidson
- Proven & Noticeable Performance Gains
- Available In Black or Chrome
- Heat Shields Available Separately
- Classic / Performance Look
- 100% MADE IN THE USA
FITS:
91' - 98' Dyna (With Mids & Forwards)
99' - 05' Dyna (With Mids & Forwards)
06' - 17' Dyna (With Mids & Forwards)
***Ramjet Thunderheader Brackets are highly recommended over the stock bracket. Available here:
https://www.ramjetracing.com/products/ramjet-99-05-dyna-thunderheader-bracket?variant=23130339377200
NOTE:
IF A TIME-SENSITIVE MATTER PLEASE CALL TO FOR CHECK FOR AVAILABILITY FIRST.
THUNDERHEADERS ARE A STOCKING ITEM HOWEVER DUE TO HIGH DEMAND, MANUFACTURING, AND COURIER SERVICE DELAYS REGARDING COVID-19, PLEASE ALLOW 10+ WEEKS FOR DELIVERY.
DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION-CONTROLLED MOTOR VEHICLES.
IF FOR RACE OR OFF-HIGHWAY USE OUR CA EXHAUST WAIVER WILL NEED TO BE SIGNED AND RETURNED PRIOR TO SHIPPING.
CALIFORNIA CARB WAIVER AVAILABLE HERE:
https://cdn.shopify.com/s/files/1/0157/0363/8064/files/CA_CARB_Waiver.pdf?573
THIS ITEM DOES REQUIRE A SHIPPING CHARGE. COSTS WILL BE CALCULATED IN CHECKOUT.