S&S CYCLE T143 Long Block Engine — 143 cu in, 4.625" stroke, 4.425" bore, 10.5:1 – 06-16 Touring, 06-15 CVO, 09-13, 15-16 Trike

Built as a high-performance drop-in long block for compatible frames, the T143 Long Block Engine delivers reliable power and improved breathing for heavy-duty touring applications.

Features include CNC-machined B3 cylinder heads with two-bolt exhaust flanges, gear drive cams and 1.725:1 rocker arms producing .674" total lift, Super Stock™ T2-style crankcases with reed breather valve and three-piece flywheels, a high-flow oil pump and revised cam cover, and premium high-performance tappets.

Fits into stock chassis with no cutting or frame modification required, but requires a T143-specific or custom exhaust and does not include carburetor, intake, or ignition—those must be purchased separately.

Revised oil routing on '99-'06 Touring models removes the need for an oil line installation kit in those applications, but this unit is not suitable for twin cooled models and is not recommended for trike conversions. Made in the USA. ⚙️