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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15
with no other modification showed an increase of 10HP & 10 ft/lbs of torque
* Will not fit 240 Tyre models (Breakout/Fatboy/FXDR)
* No need for expensive mounting hardware
• 6 Inlet vents
S&S Cycle SS900-4320A Roller Rocker Arm Kit for Big Twin 66-84 with no other modification showed1966 '84 big twins SH Series engines. S&S rocker arms for shovelhead engines are machined from 8620 steel forgings and heat treated for maximum strength. The forgings are designed to eliminate stress points and provide the strongest, most durable rocker arm possible. These roller rocker arms also feature the exclusive . 750" long S&S rocker arm bushings, with 50% more load bearing surface than stock . 500" bushings. An oil passage from the pushrod cup