Wilwood® - High Performance 4-Pistons Brake Caliper

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High Performance 4-Pistons Brake Caliper by Wilwood®. Brake calipers should be mounted square with rotor to prevent excessive piston knock-back and uneven pad wear. While looking at brake area, have someone apply brakes. Caliper should not move (square itself to rotor): only the pistons and pad should move. If caliper is not parallel with rotor, shims should be used between mounting bracket and caliper ears for proper alignment. Caliper brackets should be strong enough not to deflect under heavy braking. All caliper mounting bolts should be of the highest quality and lockwired for safety.

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Wilwood - About


  • Marked with a Rotor Rotation
  • Lug or Radial Mounting
  • 4 Pistons
  • Made in USA

Most Wilwood calipers are unidirectional because of the differential piston bore design (one end of the caliper having larger pistons than the other); the caliper must be mounted in a specific position relative to the rotor rotation. All Wilwood differential bore calipers are marked with a rotor rotation arrow on them. The caliper should be mounted so that the smaller piston end is closest to the rotor entrance and the larger piston end toward the rotor exit. The larger piston end provides slightly greater clamping force to compensate for pad taper that can occur under extended severe use applications. An improperly mounted caliper (reverse rotation) will cause increased pad taper and reduce overall braking efficiency.

Note that differential bore calipers cannot be used interchangeably from side to side - there is a left hand caliper and a right hand caliper. Also, calipers differ depending on whether the mounting is behind or in front of the spindle - this affects bleed screw position. Make sure to properly analyze these criteria when ordering and mounting or replacing differential bore calipers.

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Wilwood Engineering designs and manufactures high-performance disc brake systems. Since founding in 1977, we have developed a substantial matrix of brake components and engineering techniques that allow us to quickly and reliably create brake systems for almost any application. Their core ability is the rapid development of custom engineered brake systems using a combination of off-the-shelf and custom components. In addition to designing and manufacturing brakes for all types of competitive motor sports, Wilwood also manufactures brake systems and components for agricultural equipment, industrial applications, utility vehicles, snowmobiles, quads, motorcycles and military vehicles.

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