O-ring sealed idle mixture screw
More power across the rpm range
Stainless steel stepped header construction
S&S hydraulic cam chain tensioner improves valve timing and chain life
Relocated cam chest oil pick-up increases gear case scavenging and virtually eliminates oil carry-over at sustained high speeds
S&S CYCLE T124 Long Block Engine - Black - Touring 310-0835A Tires O-ring sealed idle mixture screwT124 Long Block Engine Black Touring High compression, Oil line installation kit required, No fuel system or ignition systems included, Special head machining fits stock length intake manifolds (S&S manifold size 410), Stock style breathing system; compatible with stock and most performance air cleaners, Includes Super Stock* heads, crankcase, high flow oil pump, cam cover, and easy start 640 gear drive cams, Made in the USA, Cylinder heads on this