S&S Cycle 550C Camshaft Kit — Chain Drive — 2017-Up M8

The 550 is S&S's big-lift grind for big-inch Milwaukee-Eights — made to let a large-displacement motor breathe high into the RPM range. This is the chain-drive kit.

FITMENT

Fits 2017-up Harley-Davidson M8 models, excluding VVT models. In our catalog: 2017-up M8 Touring 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 330-0643
• Cam kit includes the camshaft and all required bearings, o-rings, and hardware (S&S)
• Cam: S&S 550C, chain drive — designed for large-displacement M8 engines (S&S)
• Valve lift: .550 in. intake / .550 in. exhaust
• Duration at .053 in. lift: 218.9° intake / 273.1° exhaust (front); 214.2° / 277.8° (rear)
• Lobe centers: 100.0° intake / 106.0° exhaust (front); 104.0° / 100.5° (rear)
• Valve lift at TDC: .127 in. intake / .232 in. exhaust (front)
• 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

What builds is the 550 for?
Large-displacement M8s. S&S designed it for big motors; on a stock 107 it gives up low-end manners for top-end breathing. Tell us your displacement and we'll confirm it's the right grind.

Do I need valve springs?
At .550 in. of lift you are past stock spring territory on most builds — S&S includes valve springs with its 550 cam chest kits for exactly this reason. Email us your setup before ordering and we'll confirm what your heads need.

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.