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Wilwood 4-Piston RACE Big Brake Kit for 90-05 Miata


Price: $1,129.00 (+$66.00)
Item Number: WIL-BBKAB4-RACE
Configuration: -SSBL
Manufacturer: Wilwood

Personalization

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Add stainless steel front brake lines (required for installation)*


Wilwood Logo
4-Piston RACE
Big Brake Kit

1990-2005 Miata

Wilwood 4-Piston Caliper Kit - Black
The components in this kit have been selected to deliver consistent start to finish performance on vehicles built for dedicated road course competition. No detail has been overlooked. Forged aluminum Dynalite-ST calipers, fortified with Thermlock® pistons and internal knock-back damping springs, provide high efficiency clamping force, unsurpassed heat management, and the piston retraction control that all contribute to a firm and consistent pedal through any event. Oversized 11" diameter Spec37 alloy GT series 72 vane two-piece rotor assemblies mount to the OE hub with aluminum hats adding overall system brake leverage, cooling capacity, and thermal stability in this compact yet sturdy weight saving configuration. The performance package is capped with high friction, high temperature, and long wearing Wilwood PolyMatrix H compound race pads. All premium grade fastener kits include rotor bolts and caliper to mount bracket bolts that are pre-drilled for safety lock wire. 

Kit Summary Kit Contents



  • Spindle Type: Factory Disc Spindle
  • Mount Type: Lug
  • Caliper Type: 4 - Black Anodize
  • Rotor Diameter: 11"
  • Min Wheel Diameter Req'd*: 15"
Wilwood 4-Piston Caliper Kit - Black

Fitments and Details
WIL-BBK4 RACE Schematic Wheel Clearance
*NOTE: This Brake Kit may fit 15-inch wheels. Please refer to the wheel clearance diagram to check to see if it will fit your specific wheel. Wheel Clearance Diagram.

1. Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
2. This kit has been verified for fitment in select 15 x 7" racing wheels designed for oversized brake packages. Interference may occur with wheels designed for OE spec brake components.
3. Calipers in this kit have been selected for use with the OE power brakes. Contact Wilwood tech support for optional caliper piston sizes and master cylinder recommendations if using a manual conversion.

Kit Details and Specifications
Calipers Rotors Rotor Hats

Type: Forged Dynalite-ST
Finish Color: Black Anodized 
Piston Count: 4
Piston Area (In²): 3.00
Piston Type: Thermlock
Mount Type: Lug
Brake Pad Plate: 7112
Brake Pad Area (In²): 6.36
Brake Pad Volume (In³): 2.1
Pad Compound: PolyMatrix H

Type: GT 72 Straight Vane
Style: GT Slotted 
Surface Finish: Plain
Material: Spec-37 Iron
Outside Diameter (in): 11
Width (in): 0.81
Vane Count: 72 V
Design Type: GT
Bedded: No
Dynamically Balanced: No

Type: Big Brake Hat - Short Offset
Material: Aluminum
Finish Color: Black E-Coat
Hat Offset Dimension (in): 0.75
Bolt Circle 1: 4 x 3.93
Bolt Circle 2:
Bolt Circle 3:
Stud Diameter - BC 1: 0.5
Stud Diameter - BC 2: 0
Stud Diameter - BC 3: 0

Dynalite Caliper - Black Wilwood Rotor Wilwood Top Hat

Additional Parts (included)



The stock rubber lines and aftermarket stainless steel lines will not bolt to the Wilwood calipers.  Please select the Wilwood stainless brake lines for a complete bolt-on kit.  
Stainless Steel Brake Lines

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