for SuperTrapp Mufflers with 4” internal or external disc system

Fits: > Various 04-05 Dyna models 2004

8 steel drive plates and 1 High-Pro diaphragm spring

the ThunderMax Auto-Tune system analyzes the air/fuel ratio read by the wide-band oxygen sensors at warp speed after every cylinder fire and makes any necessary adjustments to the injector pulse width to achieve the desired air/fuel ratio while compensating for variations in injectors

XL with traditional H-D male mount pegs

JIMS, 'MEGANUT' TRANSMISSION PULLEY NUT Elstart Sportster for SuperTrapp Mufflers with 4”Nut with a built in lock plate. Never a loose transmission pulley again, that is what the MegaNut is all about. The built in lock plate in the Jims MegaNut works with all OEM and aftermarket pulleys. Some aftermarket pulleys may require an additional hole to be drilled and tapped in the pulley, so the lock bolt can be installed. Repl. 35241 06 nut + 35242 06 lock plate + 3595 lock plate bolts. Note: See 978332 for JIMS socket tool. Fits: > 07 21