Wilwood GP 310 brake calipers are a direct bolt-on for your 1984-present Sportster. They'll clear wire-spoked wheels (unlike most aftermarket calipers, e.g. Brembo) and include all necessary fasteners and shims.

Built around 4-piston, high performance internals, these CNC-machined, beautifully poilished billet aluminum calipers offer outstanding performance at competitive pricing, without the need for flimsy adapter brackets and other hardware. Direct leg-mounted calipers are available for all single and dual disc narrow-glide Sportsters and FXs. They'll work with your OEM rotors, as well as our narrow band EBC floating rotors. Engineered to work with your OEM master cylinder and brake lines.

The GP 310 caliper has the outstanding performance characteristics found in Wilwood's racing calipers: 4 stainless steel pistons to reduce brake fade while resisting corrosion and high temperature piston seals for extended life, controlled retraction and drag free operation.

We put Wilwood together with Galfer, USA, and now all of our Wilwood calipers come loaded with your choice of Galfer's black organic or HH sintered metallic premium brake pads.

Additionally, all of our Wilwood calipers come with Speed Bleeders already installed. Speed Bleeders incorporate an internal check valve to take most of the pain out of bleeding your brakes, making it a one-hand operation. Simply open the Speed Bleeder, pump the brake lever a few times, and close the Speed Bleeder. That's it.

What's more, our exclusive Wilwood caliper kits come with all necessary mounting hardware, fasteners and shims included, eliminating the need to buy a separate fastener kit, as with our competitors.

We stock GP 310 calipers in polished aluminum as shown. Chrome is also available. Contact us for details and pricing.

Our exclusive Wilwood caliper kits include:

  • Wilwood 4-piston brake caliper
  • All required fasteners and shims
  • Galfer premium brake pads, installed
  • Speed Bleeder, installed
None of our competitors include the last three items.


Wilwood 4-piston GP 310 caliper kit for '84-'99 Sportster

 $229.95
Model and position
Model and position


Wilwood 4-piston GP 310 caliper kit for '00-present Sportster

 $244.95
Model and position
Brake pad:

Please note that rear caliper mounting brackets are still under development, so don't order a rear caliper unless you can fabricate your own mounting hardware. Contact us to be notified when rear mounting brackets become available.


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