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Deal.ai › Brembo
Brembo
Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red)

Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red)

Best price now

$1,583.33at Hustle Hard RacingChecked 46 min ago

50% under what the other stores charge

Compared across 9 stores. Prices are checked against each store and labelled with when.

Visit Hustle Hard Racing

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Price facts

  • Lowest price today: $1,583.33 at Hustle Hard Racing (checked Nov 12, 2026).
  • Checked at 9 stores.

Our take on the Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red)

The Brembo GP4-RX is a four-piston billet aluminum front caliper set built for track and race use. Two mechanically fastened billet halves and 32mm aluminum pistons keep it light and precise, and the pad guides are machined into the body so there are no pad pins. It is a 108mm radial-mount caliper with a nickel finish and red lettering, sold as a set with pads, bleed screw, banjo bolts and crush washers. Riders choose it for the MotoGP-derived feel and consistency under hard, repeated braking; it is a serious upgrade over cast OEM calipers and sits above Brembo's street-oriented calipers.

Best forTrack and race ridersSportbike front brake upgradesRiders wanting a light billet caliperEnthusiasts building a MotoGP-style brake setup
Pros
  • Billet aluminum body, two mechanically fastened halves
  • 32mm aluminum pistons for light, precise operation
  • Pad guides machined into the body, no pad pins
  • Nickel coating with red lettering
  • Pads, bleed screw, banjo bolts and crush washers included
Cons
  • Spacers sold separately
  • 108mm radial mount and disc height must match the bike
  • Race-focused, so it needs matching master cylinder and lines
  • No dust seals typical of race calipers, more frequent servicing

Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red) prices at every store

  • Hustle Hard RacingNew

    In stock

    $1,583.33Checked 46 min ago
    Visit Hustle Hard Racing
  • Sportbike Track GearNew

    Availability unknown

    $3,166.63Checked 46 min ago
    Visit Sportbike Track Gear
  • Cycle GearNew

    Availability unknown

    $3,166.63Checked 46 min ago
    Visit Cycle Gear
  • RevZilla.comNew

    Availability unknown

    $3,166.63Checked 46 min ago
    Visit RevZilla.com
  • J&P CyclesNew

    Availability unknown

    $3,166.63Checked 46 min ago
    Visit J&P Cycles
  • eBayNew

    Availability unknownSold by get-some-throttle

    $3,166.63Checked 46 min ago
    Visit eBay
  • CarParts.comNew

    Availability unknown

    $3,166.63Checked 46 min ago
    Visit CarParts.com
  • Motomillion.comNew

    Availability unknown

    $3,166.63Checked 46 min ago
    Visit Motomillion.com
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $3,270.73Free shippingChecked 46 min ago
    Visit Amazon

Also available at

  • REVHAUS Race SupplyCheck price at REVHAUS Race Supply

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Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red) price history

Lowest price we've seen: $1,583.33 on Nov 12 at Hustle Hard Racing. Tracked across 9 stores since Nov 12.

About the Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red)

The Brembo GP4-RX is a 108mm front brake caliper set with a nickel-coated finish and red lettering. It is built from two mechanically fastened billet pieces and uses four 32mm pistons.

The brake pad guides are machined into the caliper body, so no pad pins are needed. This also reduces weight. The hydraulics and shape were tuned and tested for braking under competitive riding conditions.

The set fits most motorcycles that use 108mm calipers, measured bolt to bolt center length. Check your bike for proper sizing and fitment. The Yamaha R1 (70/7) and R6 require trimming the metal front fork mud guard for clearance and installation.

Position
Front
Color
Nickel/red
Caliper body
Billet aluminum
Surface
Nickel coating
Mounting spacing
108mm bolt-to-bolt center length
Pistons
4 aluminum pistons, 32mm diameter
Disc height
32mm-34mm
Weight
1000 grams without pads
In the box
Brake pads, bleed screw, single-hole banjo bolts, crush washers
Sold as
Set
Spacers
Sold separately
Also required
Brembo spacer and bolt kit for your bike; DOT 4 brake fluid (do not use DOT 5.1)
Master cylinder
A 19 RCS or Corsa Corta master cylinder is recommended
Installation
Replacing all of the fluid in the system is suggested when installing new calipers

Specifications

Category Type
Automotive

Questions and answers

What does the GP4-RX fit?
It is a 108mm radial-mount front caliper for 32mm-34mm disc height. Check your fork mounts and disc offset before buying, since spacers are sold separately.
Is it a direct replacement for my stock caliper?
Only if your bike uses a 108mm radial mount and the disc height matches. You may also need a different master cylinder, lines and spacers to get the best from it.
What is in the box?
The set includes the calipers, brake pads, bleed screw, single-hole banjo bolts and crush washers. Spacers are not included.
How does it compare with Brembo's cast calipers?
The GP4-RX is a two-piece billet caliper with machined-in pad guides, so it is lighter and stiffer than cast street calipers. It is aimed at competitive riding rather than everyday road use.
Does it use standard Brembo pads?
It takes Brembo's GP4-RX pad shape, and pads are included. Replacement pads should match that shape.
How much does it weigh?
About 1000 grams without pads, thanks to the billet body and the pinless pad guide design.
Where is the Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red) cheapest?
At Hustle Hard Racing, for $1,583.33, 50% under what the other stores charge, as of our latest check.
Where can I buy the Brembo 108mm GP4-RX Billet Front Caliper Set (Nickel/Red)?
10 stores we checked sell it, including Hustle Hard Racing, Amazon, Sportbike Track Gear, Cycle Gear, RevZilla.com.

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