Harddrive Air Cleaner Brackets - Bigtwin, XL — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Softail Custom (1992-1999)

Harddrive air cleaner brackets designed for Big Twin and XL Sportster models when installing aftermarket air cleaners. These support brackets accommodate various air cleaner designs and can be paired with optional breather kits or used standalone with custom breather systems.

Features

• Support brackets for aftermarket air cleaner installation
• Compatible with custom breather systems
• Works with CV/Delphi EFI bolt pattern air cleaners on fuel injection models
• Adapts to 5-inch round air cleaner covers with center bolt
• Supports M8 air cleaner assemblies without integrated breather

Specifications

• Brand: Harddrive
• Manufacturer Part #: 120231
• UPC: 191361165573
• Weight: 0.2809 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits Harley-Davidson Big Twin and XL Sportster models. Not legal for use in California on pollution-controlled vehicles — check local emissions laws before installation.

Frequently Asked Questions

Will these brackets work with any aftermarket air cleaner?

These brackets support most aftermarket air cleaners, but compatibility depends on the specific cleaner design and bolt pattern. CV/Delphi EFI models may need spacer 820-50525 for TBW fuel injection bikes.

Can I use these without a breather kit?

Yes. These brackets are available standalone. If you run a custom breather system, you do not need the integrated breather kit.

What's the difference between these and other Harddrive bracket kits?

Harddrive offers several bracket configurations. Model 820-50574/575 work with any M8 air cleaner without integrated breather. Model 820-50578 is for 5-inch round air cleaner covers.

Are these street legal in California?

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