S&S B3 cylinder heads CNC-machined with two-bolt exhaust flanges, S&S 635 easy-start gear drive cams and 1.725:1 rocker arms for .674" total lift, S&S Super Stock* T2 crankcases with reed breather valve three-piece flywheels, S&S high-flow oil pump and cam cover, S&S premium high-performance tappets, Made in the USA, T143-specific or custom exhaust required., Fits in stock chassis, no cutting or frame modifications necessary., Does not include carb/intake or ignition system. Must be purchased separately., Revised oil routing on '99-'06 Touring models make it so an oil line installation kit is no longer required.