Wilwood Forged Narrow Superlite 4R Big Brake Rear Parking Brake Kit

Wilwood Forged Narrow Superlite Big Brake Rear Parking Brake Kits provide the ultimate Big Brake solution for popular classic muscle car and modern import car rear axles that require a parking brake. The kits include Forged Narrow Superlite Radial (FNSLR) mount calipers, 13'' or 14'' two-piece rotors, and high performance BP-10 compound pads that provide an optimized and balanced braking to compliment front big brake upgrades on all types of custom, show and high performance street machines. The neatly hidden internal shoe system provides a clean installation with superior static holding power for parking.

The key to the superior performance of this kit is built around Wilwood's FNSLR (Forged Narrow Superlite Radial) aluminum brake caliper. The legendary Superlite caliper adds ease and versatility of the radial mount design. Radial mounting simplifies installation and gives you a couple of adjustment planes for accurate alignment over the disc. Wilwood integrated ''Big Brake'' technology to produce unmatched stopping power in extreme conditions in a wide variety of competition vehicles. The FNSLR legendary performance 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 four-piston equal bore configuration provides balanced loading for even pad wear in sustained high heat environments. The standard FNSLR calipers feature one-piece stainless steel pistons. Stainless is used for its slow heat transfer properties and high resistance to corrosion. The stainless steel piston offers an 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 FNSLR 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.

• Forged narrow brake caliper body designed specifically for tight clearance applications
• Stainless steel pistons are utilized for their low heat transfer properties and high resistance to corrosion
• Internal fluid passages - no external tubes
• Caliper only weighs 4.9 pounds

Internal Shoe Parking Brake

• Cable actuated internal shoe assemblies generate superior holding power.
• The complete assembly is neatly hidden inside the rotor hat for a clean and uncluttered installation.
• Factory pre-assembled backing plates with shoes are spring loaded for positive release and rattle free operation.
• A universal cable kit for custom applications is available separately. Order part number 950-330-9371.

GT Slotted Rotors
Wilwood's GT Curved Vane rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every rotor is precision machined to less than .001'' run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest braking available.

SRP Drilled & Slotted Rotors
Wilwood's SRP Drilled Performance Rotors feature a specially engineered directional cross drill and face slot pattern that improve brake response and pad performance throughout the entire range of light to heavy braking. The venting and cleaning action of the holes and slots will reduce pad glaze and disperse gasses and heat generated during the pad to rotor interface. The holes and slots also inhibit irregular pad compound build-up on the rotor faces resulting in smoother engagement and improved pedal response in all conditions. The material removed also contributes to lower rotating and unsprung suspension weight. Along with the excellent performance characteristics of this rotor design, each rotor is treated with a black electro coat to inhibit corrosion on all areas of the rotor. The high tech design, classic style, and aesthetic appeal of the SRP series are the perfect finishing touches to any wheel and tire detail.