Wilwood Rear Disc Big Brake Kit 12.88" Ford Bronco w/ 2.36" Offset Plain Red

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Forged Narrow Superlite 4R Big Brake Rear Parking Brake Kit
GT 48 Curved Vane 12.88" Plain Rotor / Red Powder Coated Caliper

The manufacturer advises the use of some 17" or larger wheels.

• ONLY FITS:
• Big Ford Bronco Flange with 2.36" Axle Offset

Please measure your rear end Axle Flange as well as the Axle Offset Prior to Ordering to make sure this kit will fit on your car

• Kit Includes:
• Pair of GT 48 Curved Vane Rotor 12.88" x 1.1" plain rotors - Vented for proper cooling
  
  
• Aluminum Rotor Hat - with 5 x 5.50 Bolt Pattern
  
  
• NEW pair of Forged Narrow Superlite 4 Radial Mount Red Powder Coated 4 piston Calipers. Piston Area 1.96"
  
  
• Internal Parking Brake with Caliper Bracket
  
  
• Full set of Semi-Metallic pads Wilwood BP-10 Pad Compound great for street use and light track use.
  
  
• All necessary hardware (nuts bolts)
  
  
• Full Color instruction booklet

This versions of Forged Narrow Superlite 4R rear disc kits provide the ultimate Big Brake solution for Bronco 65-77 rear axles with Big Ford flange and bearing. (normally: OE 11 inch diameter brakes and 3300 GVW.) Each includes a high efficiency drum style parking brake assembly. FNSL4R four piston calipers, 13 or 14 two-piece rotors, and high performance BP-10 compound pads provide optimized and balanced braking to compliment front big brake upgrades available for Bronco platform. The neatly hidden internal shoe system provides a clean installation with superior static holding power for parking. Optional caliper finishes and rotor designs allow builders to personalize the style and performance for every application.

Black Forged Narrow Superlite 4R Four Piston Calipers:

Caliper Highlights:
The Forged Narrow Superlite 4R (FNSL4R) is Wilwood's newest version for the venerable Superlite caliper series adds the versatility and convenience of radial mounting to this widely popular caliper group. Radial mounting simplifies adaptation and provides two planes of adjustment for accurate alignment over the disc. These calipers integrate "Big Brake" style with Wilwood's latest technology to generate big stopping power in extreme environments over a broad range of vehicle applications.

The key to the superior performance of the FNSL4R comes from the extremely durable and efficient body design. Starting at 4.9 pounds it is the product of computer generated solid modeling and FEA stress analysis technology. The most noteworthy feature of this new caliper design is the forging. Each body is stress-flow forged from premium grade aluminum alloy billets. Stress-flow forging re-aligns the metal's internal grain structure to flow within the contour of the caliper body. This process eliminates the stresses and interruptions to the internal grain structure that occur when machining a straight block billet. Simply stated, there is no better way to build a stronger aluminum caliper body.

The standard FNSL4R calipers feature one-piece stainless steel pistons. Stainless is used for its slow heat transfer properties and high resistance to corrosion. Calipers can be upgraded with Wilwood's exclusive Thermlock pistons. This multi-part piston design creates a highly efficient thermal barrier to further reduce heat transfer from the pads to caliper body, seals, and fluid. Cooler temperatures translate to longer service life and less chance for heat induced pedal fade.

In addition, each FNSL4R is equipped with SRS bridge plates. SRS plates eliminate all bridge wear caused by pad gouging and extend the service life of the caliper. The spring-loaded action of the SRS plates also eliminates pad rattle and dampens the harmonic vibrations that contribute to pad squeal. Two piece bleed screws on each end and internal fluid crossovers prevent damage from track debris and other potential damage sources. High temperature, square faced bore seals provide the largest possible sealing area and controlled piston retraction on release. The full range of Wilwood pad compounds is available to match the brake response and heat range of any competition or sports driving application.

Total Piston Area (in): 1.96

GT 48 Curved Vane Rotor

GT-48 curved vane rotors are built for the extreme conditions of professional motorsports. The superior heat absorption and dissipation characteristics of these heavy wall directional vane rotors are the keys to preventing heat fade and realizing long service life from the rotors and pads. All rotors are cast from premium grade, long grain carbon iron for long wear, thermal stability, and resistance to distortion. Every GT rotor is fully detail machined to eliminate stress points and unnecessary weight away from the pad sweep face. The faces and O.D. are precision turned to less than .001" for flatness, parallelism, and run-out. An asymmetrical face slot pattern provides smoother engagement through reduced harmonics and improved thermal balance between the I.D. and O.D. of the rotor. Every rotor is then individually dynamic balanced to provide vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition.

• Features:
• Heavy Duty 48 VaneSpec-37 Iron castings.
• Suitable for moderate to hiigh temperature racing to street use.
• Surface Finish: Plain

• Rotor Dimensions:
• Width (in): 1.1
• Diameter (in): 12.88