S&S Cycle Tappets — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)

S&S Cycle tappet cuffs for 2017+ Harley M8 engines, engineered to capture and stabilize tappets during high-RPM and high-lift cam operation without restricting vertical motion. Billet aluminum construction with hard anodized finish resists distortion where stock cuffs flex.

Features

• Billet aluminum construction
• Hard anodized black coating
• Captures tappets without impacting vertical travel
• Maintains tappet alignment at high RPM and lift
• Easy upgrade during cam or tappet changes
• Stronger material resists distortion

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 330-0655
• Category: Engine Components / Push Rods
• Weight: 0.37 lb
• Material: Billet aluminum
• Finish: Hard anodized black

Fitment

Fits Harley-Davidson 2017 and newer Milwaukee-Eight (M8) models.

Frequently Asked Questions

Will these fit my pre-2017 Harley with a Twin Cam engine?

No — these cuffs are designed for 2017+ M8 engines only. Twin Cam models require a different part number.

Do I need to check clearance when installing?

Yes. Due to manufacturing variances between cam and tappet suppliers, verify tappet-to-cuff clearance before final assembly to ensure proper fit.

When should I install these?

Best installed during a cam change or tappet service. They're a direct swap onto the pushrods without special tools.

What problem do these solve?

Stock tappet cuffs can flex and allow tappet movement at high RPM, leading to wear and noise. S&S billet cuffs keep tappets perfectly aligned under stress.