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S&S Cycle 06-17 Dyna T124 Black Edition Long Block Engine - Wrinkle Black (Part Number: 310-0900A)
When your factory Twin Cam layout isn't throwing the kind of torque you need anymore, patching it up with small upgrades is just a temporary fix. Dropping an S&S Cycle T124 Black Edition Long Block into an '06 to '17 Dyna chassis is how you actually skip the guesswork and secure massive, reliable displacement. This isn't a mismatched collection of aftermarket components; it’s a complete, fully engineered 124-cubic-inch muscle core built straight out of La Crosse, Wisconsin. Finished in a rugged wrinkle black powder coat that perfectly aligns with your stock styling, this engine is designed to handle sustained high-output street tearing without breaking a sweat.Why the T124 Long Block Changes the Game
124 Cubic Inches of Pure Street Authority
With a massive 4-1/8” bore and a 4-5/8” stroke, this monster shifts your platform into a completely different tier of performance. It runs a crisp 10.8:1 compression ratio with premium forged flat-top pistons. To keep the power delivery brutal yet predictable, S&S packed in their legendary 640 gear drive Easy Start cams. You won't have to stress about hard starting or starter motor strain, even with this level of compression.No-Hassle Intakes & Component Matching
One of the smartest things about the engineering here is how S&S handled the cylinder head geometry. Even though the cylinders are longer than standard factory ones, the Super Stock heads are custom-machined to compensate. What does that mean for your garage build? Your stock-length intake manifolds, throttle bodies, and air cleaner backplates bolt right up without weird clearance issues or custom fabrication.Features & Structural Benefits
- High-Flow Oiling Infrastructure: Ships with a high-capacity S&S oil pump and premium cam plate to guarantee consistent oil pressure and proper heat dissipation during aggressive runs.
- Super Stock Cylinder Heads: Specially machined 99-05 style heads optimized for maximum flow and drop-in compatibility with stock-length intake runners.
- Easy Start 640 Cams: Gear-driven cam setup eliminates chain tensioner worries while ensuring immediate starting without compression releases.
- Wrinkle Black Finish: A durable, heat-resistant textured black coat that matches your original Harley frame and component aesthetic seamlessly.
Vehicle Fitment Applications
This long-block engine assembly is explicitly machined and configured for 2006–2017 Harley-Davidson Dyna (FXD / FXDWG) models.- 2006–2017 Harley-Davidson Street Bob (FXDB)
- 2006–2014 Harley-Davidson Low Rider (FXDL) & 2016-2017 Low Rider S (FXDLS)
- 2006–2010 Harley-Davidson Dyna Super Glide (FXD) & Custom (FXDC)
- 2008–2017 Harley-Davidson Fat Bob (FXDF)
- 2006–2017 Harley-Davidson Dyna Wide Glide (FXDWG)
- 2012–2016 Harley-Davidson Switchback (FLD)
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