S&S Cycle T124 Twin Cam Engine for 1999-2017 Harley-Davidson Dyna and Touring

S&S Cycle T124 Twin Cam Engine for 1999-2017 Harley-Davidson Dyna and Touring

The S&S T124 is built for riders who want everything a Twin Cam Dyna or Touring can offer and then some. With 124 cubic inches on tap, a cam-matched compression ratio tuned for either strong low-end torque or peak output, and easy-start gear drive cams that make every cold morning a non-event, this engine changes the character of the bike it goes into.

Key Features

• Not compatible with Harley-Davidson Softail models or Twin-Cooled models — fits Dyna and Touring platforms only; see fitment table for full details
• 124-cubic-inch displacement for a commanding increase in horsepower and torque over stock Twin Cam engines
• S&S Easy Start 585 or 640 gear drive cams — cam selection also determines compression ratio
• 585 cam configuration: 10.2:1 compression — higher torque tuning, recommended for Touring applications
• 640 cam configuration: 10.8:1 compression — higher output tuning for performance-focused builds
• Electronic compression releases for effortless starting
• Large cooling fins for improved thermal management
• S&S forged rocker arms and high-flow oil pump
• Gloss black rocker covers, gear cover, tappet blocks, and pushrod tubes
• Uses stock intake, throttle body, and air cleaner — not included
• Available in Black, Black Edition, Stone Gray, and Silver finishes (availability varies by model group)
• Made in the USA
• Two-year warranty

Technical Specifications

• Displacement: 124 cubic inches
• Compression Ratio — 585 Cams: 10.2:1
• Compression Ratio — 640 Cams: 10.8:1
• Cam Options: S&S Easy Start 585 gear drive or S&S Easy Start 640 gear drive
• Cam Drive: Gear drive
• Rocker Arms: S&S forged
• Oil Pump: S&S high-flow
• Compression Releases: Electronic
• Intake / Throttle Body / Air Cleaner: Not included — uses stock components
• Finish Options: Black, Black Edition, Stone Gray, Silver (availability varies by model group)
• Dimensions — 1999-2006 Group, select finishes (L x W x H): 26.5″ x 24.56″ x 20.06″
• Dimensions — 2007-2016 Touring Black (L x W x H): 26″ x 24″ x 20″
• Dimensions — 2007-2016 Touring Black Edition / Black 640 / Dyna Black (L x W x H): 27″ x 25″ x 20″
• Dimensions — 2006-2017 Dyna Black Edition (L x W x H): 26″ x 24″ x 20″
• Emissions: Not legal for sale or use in California on pollution-controlled motor vehicles. Not legal for sale or use on any EPA pollution-controlled motor vehicle.
• Origin: Made in USA
• Warranty: Two years

Fitment Notes

• Not compatible with any Harley-Davidson Softail model — this is an absolute exclusion regardless of year
• Not compatible with Twin-Cooled Touring models (select 2014-2016 models)
• Three fitment groups apply — select the correct variation for your year and platform: 1999-2006 non-Softail Twin Cam (except 2006 Dyna); 2006-2017 Dyna; 2007-2016 Touring
• Cam selection (585 or 640) affects compression ratio in addition to power character — select based on intended application
• 585 cam variant is recommended for Touring applications where low-end torque is the priority
• Stone Gray finish is available for 2007-2016 Touring only; Silver is available for 1999-2006 group only
• Uses stock intake, throttle body, and air cleaner — these components are not included
• Review the Fitment tab for a complete year and model breakdown