S&S Cycle 550G Camshaft Kit — Gear Drive — 2017-Up M8

The 550 in gear drive: S&S's big-lift grind for big-inch Milwaukee-Eights, with the timing accuracy of gears and no tensioner to service. Made to let a large-displacement motor breathe high into the RPM range.

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 330-0647
• Cam kit includes the camshaft and all required bearings, o-rings, and hardware (S&S)
• Cam: S&S 550G, gear drive — designed for large-displacement M8 engines (S&S)
• Gear drive provides improved valve timing accuracy and eliminates the cam drive chain and tensioner (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.

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.