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Harley Davidson Performance motor Upgrade S&S T143  1999-2006 Carbureted Touring Models (except 2006 Dyna) Replacement Twin Cam engine   Black & Silver - 310-0737
Ultra performance race engine double the horsepower of the stock eng

Harley Davidson 1999-2006 S&S T143 Performance motor upgrade Carbureted Touring Models engine (except 2006 Dyna) Replacement Twin Cam T143  From S&S Cycles In Black & Silver - 310-0737

S&S Ultra performance/race engine T143 Motor double the horsepower of the stock engine smoother and does away with crappy Cam chains too"!

Displacement - 143"    Bore - 4.425    Stroke - 4 5/8"    Cam - 635    Piston Type - S&S Forged Flat Top

Compression Ratio - 10.5:1


  • Fits in stock chassis – no cutting or frame modifications
  • S&S B3 cylinder heads CNC machined with 2 bolt exhaust flanges
  • S&S Super Stock T2 Crankcases with reed breather valve
  • 3 Piece Flywheels
  • S&S high flow oil pump and cam cover
  • S&S 635 Easy Start Gear Drive Cams and S&S 1.725:1 rocker arms for .674" total lift.
  • S&S Premium High Performance Tappets


How S&S Cycles started: What started as a passion for speed, grew into the best known company name in the V-Twin high performance aftermarket. George J. Smith had to build his own parts to make his motorcycle faster. Now the company he founded manufactures the most prestigious line of "go fast" v-twin engine parts in the world. The company was started in the basement of his home in Blue Island IL in 1958, and moved to Viola, WI in 1969. In 2004 an additional facility was opened in La Crosse, WI.