S&S CYCLE SKU: T14-663660

S&S Cycle 551GE Gear Drive Cam Chest Kit - Harley Twin Cam Dyna

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About S&S Cycle

S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.

Unleash the full potential of your Harley Twin Cam Dyna with the S&S Cycle Complete Gear Drive Cam Chest Kit. This comprehensive kit replaces all critical cam chest components with premium, U.S.-made parts. It upgrades your engine's performance and reliability by eliminating the risk of cam chain failure through its robust gear drive design.

Why riders pick this

  • Complete cam chest overhaul kit
  • S&S performance gear drive camshafts included
  • Eliminates cam chain failure risk
  • Upgraded oil pump for consistent pressure
  • U.S.-made S&S Cycle components

For riders looking to push their Harley Twin Cam Dyna to its limits, the S&S Cycle 551GE Cam Chest Kit is a game-changer. This all-in-one solution includes S&S performance gear drive camshafts with optimized timing and higher lift, a high-flow oil pump, a durable cam support plate, and new tappets. The gear drive system is a significant upgrade over chain-driven cams, providing a more precise valve train operation and eliminating the common concerns associated with cam chain tensioners.

Engineered for Performance and Durability

  • Complete cam chest overhaul with premium U.S.-made components
  • S&S performance gear drive camshafts for improved power delivery
  • Eliminates cam chain failure risks with a robust gear drive design
  • Includes an upgraded oil pump for better, more consistent oil pressure
  • Designed to bring 1999-2006 Twin Cam engines to 2007+ specifications

A Foundation for Serious Power

This S&S Cycle Cam Chest Kit provides a solid foundation for any performance build, ensuring your Twin Cam engine runs stronger and more reliably. The enhanced oil pressure and more stable valve timing contribute to a more responsive engine and prolonged component life. While designed for 2007-2017 Dyna models, it offers a crucial upgrade path for earlier Twin Cams, making it a versatile choice for a wide range of Harley Dyna owners.

Specifications

  • Brand: S&S Cycle
  • Manufacturer Part #: 310-0815
  • Weight: 12.75 lb
  • Category: Engine Components / Cam Gears

Common questions

Will this kit fit my 1999-2006 Dyna?

Yes, this kit includes an upgraded oil pump that allows 1999-2006 Harley Twin Cam Dyna models to be retrofitted to 2007+ specifications, providing a significant upgrade.

Does this kit require a dyno tune?

Installing a performance cam kit like this will significantly change your engine's characteristics. A proper dyno tune is highly recommended to optimize performance, fuel mapping, and ensure engine longevity.

What is the main benefit of a gear drive cam?

The primary benefit of a gear drive cam is the elimination of cam chains and tensioners, which can wear out and fail. This results in more precise valve timing, increased reliability, and a more durable valvetrain.

Ordering from Vtwinbikers

  • Brand new, sourced through authorized US distribution — never used, never grey-market.
  • Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
  • Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
BRANDS&S Cycle
TYPECam Gears
SKUT14-663660
WEIGHT12.75 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.84
51 RATINGS
5★ 45
4★ 5
3★ 0
2★ 1
1★ 0
✓ VERIFIED
Nov 9, 2021

10/10 would recommend

Nearing 40k miles on my 2018 Road Glide I was concerned with some of the issues the stock M8 was having. Conveniently this kit fixes everything that I was worried about and has the added bonus of 30HP and 10TQ. The 475 cam really woke up my 107" and you can feel the increase in acceleration power through all the gears but especially over 70MPH.<br />- Wiz IOMC <8> IOFFIO

— Gregory C
✓ VERIFIED
Nov 1, 2022

Overkill, just like I wanted

Great kit with just about everything you need. Plenty of online tutorials to make it quite simple. Took me about 6hrs from start to finish, and I did it all in my front yard

— Atreyu S
✓ VERIFIED
Nov 8, 2021

Great product, A+. Great sound and quality

The kit is amazing, great quality and all parts needed for the job. Easily the best upgrade I?ve done to my bike. It?s exactly what the M8 needs to make it sound good. Would absolutely recommend.

— Cory G
✓ VERIFIED
Oct 29, 2021

The 475 cam really woke up my M8! More power and better sound the hardest thing to do ended up being removing and installing the exhaust. I highly recommend this.

— Glenn W
✓ VERIFIED
Jul 27, 2023

A superb kit. All inclusive except… (and not a real show stopper), read on —

Mostly bought this kit for the oil pump to avoid any problems with potential sumping issues but the old Harley battle cry “as long as we’re in there…” ruled in my case. Saw no downside to the 475 cam and wasn’t disappointed. New cam, cam plate, new lifters and adj pushrods, of course, and no warm fuzzies with the plastic lifter sleeves (not incl in this kit), so those went as well. No dyno to share as I went with a canned tune from FuelMoto on a DynoJet PowerVision and am autotuning. Butt dyno says good gains in hp and tq. Glad I did it. My only mild negative is that it wasn’t blasting me in the face that I needed a HD brand o-ring/gasket for the oil pump that they, for proprietary reasons, could not include. It may have been mentioned somewhere but I don’t recall seeing it. Not a big deal and certainly no reason to go elsewhere for a kit. This most excellent kit, except for said gasket, was otherwise all inclusive and I can’t recommend it too highly. Good job S&S. 2019 FLHXSE 117, oil cooled

— William W
✓ VERIFIED
Mar 14, 2024

Was worth it to me

Traded mpg for the power and chop from this cam. M8 107 dyno'd at 110hp 122tq.<br />2017 stock header, cat delete, x-over capped to 2-1, neighbor hater, k&n 63-1138

— Travis G