It is not as durable as cast iron but typically used in high performance and racing applications where rapid heat transfer from the valve to head is important

for SuperTrapp Mufflers with 4” internal or external disc system

8 steel drive plates and 1 High-Pro diaphragm spring

XL with traditional H-D male mount pegs

Fits: > Various 04-05 Dyna models 2004

JIMS, 'MEGANUT' TRANSMISSION PULLEY NUT Elstart Sportster It is not as durableNut 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