S&S CYCLE Motor Install Kit - Black - FXD 310-0870 Motorcycle Tires - Off Road resulting in a 37% increase

resulting in a 37% increase in airflow

S&S stainless steel bolts with washers

S&S valve springs work with cams up to

Rear motor mount bolts directly to the stock transmission

S&S CYCLE Motor Install Kit - Black - FXD 310-0870 Motorcycle Tires - Off Road resulting in a 37% increaseMotor Install Kit Black FXD High Compression, 10. 8: 1 for the ultimate in street performance, 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, crankcases, high flow oil pump, cam cover and easy start cams, Specs: displacement 124"; bore 4 1 8"; stroke 4 5 8";