S&S Cycle HPT560 Camshaft Kit — Chain Drive — 2017-Up M8

The cam for the VVT Milwaukee-Eight 121 — a bolt-in HPT560 that wakes up the CVO motors without custom grinding or timing work. This is the cam-only kit; the full cam chest version is the HPT560 Cam Chest Kit.

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 330-0840
• Cam kit includes the camshaft and all required bearings, o-rings, and hardware (S&S)
• Cam: S&S HPT560, chain drive — bolt-in for 2023-up M8 VVT engines (S&S)
• Machined from high-strength billet 8620 steel (S&S)
• Works with the stock valvetrain; also optimized for S&S rocker arms (S&S)
• S&S rates the HPT560 at up to +24 hp and +14 lb-ft over stock when paired with S&S intake and exhaust
• Made in the USA

INSTALLATION

Camshaft installation is internal engine work. The kit includes the bearings, gaskets, o-rings, and hardware S&S specifies for the job; follow the S&S instruction sheet included in the box and your Harley-Davidson service manual for timing and torque specs. S&S publishes an official cam chest install video — it is embedded below. Professional installation is recommended; email us if you'd like a referral to one of our install partners.

QUESTIONS RIDERS ASK

Will this fit my 117?
No — the HPT560 is only for the 2023-up 121 VVT engines (CVO Street Glide / CVO Road Glide). Per S&S, the VVT560 cam can only be installed on a 121 engine. For a Gen 2 non-VVT bike, look at the HPT542.

Cam only or the full chest kit?
This kit is the cam and its install hardware. If your cam chest is high-mileage or you want the oil pump and plate upgraded at the same time, the HPT560 Cam Chest Kit (310-1432 / 310-1433) does the whole chest in one job.

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.