S&S CYCLE Engine Case - +4.000" Bore - Special Application - Evolution Big Twin 31-0047 Motorcycle Tires - Off Road Kits include all required bearings

Kits include all required bearings

8:1 for the ultimate in street performance

Piston Kit - For 97" Big Bore Kit - 3

standard or universal cover

S&S CYCLE Engine Case - +4.000" Bore - Special Application - Evolution Big Twin 31-0047 Motorcycle Tires - Off Road Kits include all required bearingsEngine Case +4. 000" Bore Special Application Evolution Big Twin Designed for high performance engines with cylinder bores 4. 000", 4. 125" and 4. 375"., Cam chest is moved outward 0. 250" to allow crankcases to handle large cylinder bore sizes, Clearanced for strokes as long as 5. 000", Relocated cam chest oil pick up increases gear case scavenging and virtually eliminates oil carry over at sustained high speeds, Machined to accept the stock oil