Harddrive Air Cleaner Brackets - M8 (ex 23 Cvo) — Harley-Davidson Road King Special, Electra Glide Ultra Limited, Street Glide (2017-2025)

Harddrive air cleaner brackets for Milwaukee-Eight (M8) engines, designed to support aftermarket air cleaners without integrated breather systems. These brackets allow flexible mounting of various M8-compatible air cleaner assemblies and work with optional spacers for EFI conversion applications.

Features

• Support brackets for aftermarket M8 air cleaners
• Compatible with custom breather systems
• Works with spacer 820-50525 for CV/Delphi EFI bolt pattern conversion
• Enables use of 5" round air cleaner covers with center bolt
• Not legal for California pollution-controlled vehicles

Specifications

• Brand: Harddrive
• Manufacturer Part #: 120425
• UPC: 191361228919
• Length: 10 in
• Width: 7 in
• Height: 2 in
• Weight: 2 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits Harley-Davidson Milwaukee-Eight (M8) engines. Not legal for use in California on pollution-controlled vehicles; check local emissions laws before installation. Not compatible with 2023 CVO models.

Frequently Asked Questions

What air cleaners work with these brackets?

These brackets support any M8-compatible air cleaner assembly without integrated breather. Use with optional spacer 820-50525 for CV/Delphi EFI applications.

Can I use a custom breather system with these?

Yes — these brackets are designed to work with custom breather systems. Breather kits are sold separately.

Are these legal in California?

No — these brackets are not legal for use in California on pollution-controlled vehicles. Check local emissions laws before installation.

Do I need a spacer with these brackets?

Not required for standard M8 applications. Spacer 820-50525 is only needed if converting EFI bolt patterns to TBW models.

Will these fit 2023 Harley CVO models?

No — this part number excludes 2023 CVO models. Check with the manufacturer for CVO-specific bracket part numbers.