S&S Cycle HPT560 Cam Chest Kit — Chain Drive, Chrome Pushrod Tubes — 2023–2026 M8 VVT

The only complete cam chest kit built for the VVT Milwaukee-Eight 121. The HPT560 cam is a bolt-in for the 2023-up VVT engines, and S&S pairs it with their billet cam plate and oil pump, Precision tappets, tappet cuffs, and Quickee pushrods. S&S rates the cam at up to 24 hp and 14 lb-ft over stock when combined with S&S intake and exhaust.

FITMENT

Fits 2023–2026 Harley-Davidson M8 models with VVT (Variable Valve Timing) — the 121 cu in CVO Street Glide and CVO Road Glide. Per S&S, the VVT560 cam can only be installed on a 121 engine. Does not fit non-VVT M8 models.

Not sure it fits your bike? Email info@norcalbaggersupply.com — email is the fastest way to reach us — and we'll confirm before you order. You can also call 916-626-9030 (Mon–Fri, 9 AM–5 PM PT).

CALIFORNIA NOTICE

Race use only — not legal for use in California. S&S Cycle publishes no CARB Executive Order for this part, and S&S marks it "NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE." It is not legal for use on pollution-controlled vehicles operated on public streets or highways in California, and we cannot ship it to a California address — orders shipping to California will be cancelled and refunded. Available for shipment to the other 49 states.

SPECIFICATIONS

• Manufacturer: S&S Cycle — part number 310-1432
• Cam: S&S HPT560, chain drive, machined from billet 8620 steel — bolt-in for VVT engines, works with the stock valvetrain (S&S)
• Kit drive: chain drive; pushrod tubes: chrome
• Cooling: water-cooled VVT engines
• Oil pump/cam plate: precision machined from billet aluminum; independent scavenge sections for flywheel cavity and cam chest
• 44% flow increase on the supply side and 58% flow increase on scavenge vs. stock (S&S figure for the pump/plate)
• Debris screens in both scavenge pickups; magnet in the cam chest helps stop debris from entering the oil pump
• Pressure relief valve is adjustable with the unit installed in the engine; passage plugs removable for servicing
• S&S Precision Tappets — hand assembled to exacting tolerances, close tolerances for low leak-down rates, fast pump-up
• S&S Quickee adjustable pushrods included
• Includes all gaskets, bearings, and hardware required for installation
• Made in the USA

INSTALLATION

This is a full cam chest build: the kit replaces the cam plate, oil pump, cam, tappets, and pushrods. Follow the S&S instruction sheet included in the box and the torque specs and timing procedure in your Harley-Davidson service manual. S&S publishes an official install video for its cam chest kits — it is embedded below. Professional installation is recommended; if you'd rather not do it yourself, email us and we can refer you to one of our install partners.

QUESTIONS RIDERS ASK

Will this fit my non-VVT 117?
No — this kit is only for the 2023-up 121 VVT engines (CVO Street Glide / CVO Road Glide). For a 2024-up non-VVT Gen 2 bike, look at the HPT542 cam chest kits.

What's in the box?
The HPT560 cam, S&S billet cam plate and oil pump, Precision tappets, tappet cuffs, Quickee adjustable pushrods with chrome tubes, and all gaskets, bearings, and hardware for the install.

Can you ship this to California?
No. This is a race-use-only part that does not conform to CARB standards, so we do not ship it to California — see the California Notice above. It is available to the other 49 states.