Thunderheader Black 2-Into-1 Exhaust System 2006-17 Dyna w/ Mid & Forwards (18mm,12mm O2 Ports)
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We are a stocking dealer for Thunderheader, if this part shows in stock on our site it will ship same day if the order is placed by 2pm EST. We do not backorder or drop ship these exhausts. We have them in stock in our warehouse for fast shipping. There is no long lead time to wait on.
Thunderheader #1039B Black 2-Into-1 Exhaust System 2006-2017 Dyna w/ Mid & Forwards (18mm,12mm O2 Ports)
Thunderheader™ head pipes have been tuned to the proper length & diameter, to produce maximum horsepower, and a excellent torque curve. In addition to “tuned” head pipes, a patented collector is used. The collector is designed to direct spent gases through four acoustical dampening chambers. The flow director serves a “multi-task” function, (1); directs outgoing flow through four acoustical dampening chambers creating a spiral motion upon exiting to atmosphere. (2); it also forms a pyramidal shaped “anti-revision” trap to minimize the amount of air rushing in.
In conjunction with the “flow director”, a diffuser shroud is attached to the reverse cone. This patented device is designed to defuse the air rushing in as the pressure inside of the system becomes equal to atmosphere.
All THUNDERHEADER™ Exhaust Systems are legal for CLOSED-COURSE COMPETITION use only. Not legal for sale or use in California.