S&S CYCLE T143 Long Block Engine — 143" displacement, 4.425" bore, 4.625" stroke, 10.5:1 compression – 99-06 Touring, 00-06 CVO, 00-06 Softail, 99-05 Dyna

The T143 Long Block Engine combines S&S performance hardware into a complete long block for reliable power and durability. ⚙️

Built with S&S B3 CNC‑machined cylinder heads with two‑bolt exhaust flanges, S&S 635 easy‑start gear drive cams and 1.725:1 rocker arms for .674" total lift, and S&S Super Stock™ T2 crankcases with reed breather valve and three‑piece flywheels.

Includes S&S high‑flow oil pump, cam cover, and premium high‑performance tappets; made in the USA. 🇺🇸

Fits in stock chassis with no cutting or frame modifications required, but requires a T143‑specific or custom exhaust.

Carburetor/intake and ignition system are not included and must be purchased separately; revised oil routing on '99–'06 Touring models eliminates the need for an oil line installation kit.