S&S B3 cylinder heads CNC-machined with two-bolt exhaust flangesS&S 635 easy-start gear drive cams and 1.725:1 rocker arms for .674'' total liftS&S Super Stock™ T2 crankcases with reed breather valve three-piece flywheelsS&S high-flow oil pump and cam coverS&S premium high-performance tappetsMade in the USAT143-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.