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S&S Cycle T143 Long Block Engine - Black Edition - 310-0837A



The S&S T143 Long Block engine is the largest S&S engine that will fit in a stock Harley- Davidson chassis. At double the HP of a stock motor, the power of the T143 requires technical expertise for the installation and tuning along with an experienced rider. This is an ultra performance/race engine. Longevity, engine noise, vibration and throttle sensitivity have all been compromised to reach this level of performance while fitting in a stock chassis and, as such, is not suitable for every situation. It is the purchasers responsibility to consider the suitability for their application.
Engine noise and damage from abuse is not covered under warranty.
Fits in stock chassisno cutting or frame modifications
S&S B3 cylinder heads CNC-machined with 2-bolt exhaust flanges
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 in. total lift
S&S Premium High Performance Tappets
Made in USA
NOTE: Does not include carb/ intake or ignition system. Must be purchased separately
NOTE: T143-specific or custom exhaust required

Product Series

Application List

2007 - 2016Harley DavidsonFLHTCU Electra Glide Ultra Classic
2007 - 2013Harley DavidsonFLHTC Electra Glide Classic
2007 - 2007Harley DavidsonFLHRS Road King Custom
2007 - 2013Harley DavidsonFLHRC Road King Classic
2007 - 2009Harley DavidsonFLHT Electra Glide Standard
2010 - 2014Harley DavidsonFLHTK Electra Glide Ultra Limited
2007 - 2016Harley DavidsonFLHR Road King
2015 - 2016Harley DavidsonFLHTCUL Electra Glide Ultra Classic Low
2007 - 2016Harley DavidsonFLHX Street Glide
2010 - 2013Harley DavidsonFLTRX Road Glide Custom
2014 - 2016Harley DavidsonFLHXS Street Glide Special
2007 - 2009Harley DavidsonFLTR Road Glide
2015 - 2016Harley DavidsonFLTRX Road Glide
2015 - 2016Harley DavidsonFLTRXS Road Glide Special

Shipping Information

  • Item Requires Shipping
  • 500.0 lbs.
  • Free Ground Shipping (1 - 5 Days)