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Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638

Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638
Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638
$3,756.99 ea
NEWOut of stock with WILWOOD ENGINEERING as of 01/07/2023
Model: 3920786
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY

Forged Narrow Superlite 4R/ST four piston radial mount race caliper rear kits are the engineered match for the AERO6R/ST front race kits on vehicles intended for unrestricted road race competition. All emphasis is on matched front to rear balance, high durability, and high efficiency heat management, without adding unnecessary rotating or unsprung weight to the driveline and rear suspension. FNSL4R/ST calipers use a forged aluminum body and feature a Type III Mil-Spec, medium gray color hard anodized finish. Hard anodizing provides superior wear resistance in the piston bores, and high resistance to abrasion and corrosion throughout. Thermlock® pistons are used to reduce heat transfer from the pads to increase fade resistance, and extend service life by decreasing temperatures in the caliper body, fluid, and seals. Internal damper springs and controlled retraction, high-temperature piston seals assure consistent pedal height from start to finish. Caliper piston volumes are matched for full compatibility with the OE master cylinder output and ABS controls. The calipers are also fully compatible with manual brake conversions to balance bar pedals using appropriately sized master cylinders. Spec37 alloy GT series directional vane 12.88” rotors are dynamically mounted to the OE hubs with weight saving forged aluminum hats. As is with the calipers, the hats are hard anodized for superior wear resistance and extended service life at the load bearing surfaces. Mounting brackets, including all premium grade fasteners, secure the calipers to the uprights in the stock location with no modifications required. This championship proven system is completed with high temperature, high friction, race compound pads selected specifically by application. Installation requires the separate purchase of the stainless steel braided flexline kit that must be ordered according to the model year.

Fitment Notes

1. Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
2. Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.

About Wilwood Engineering

Wilwood Engineering designs and manufactures high-performance disc brake systems. Since the company’s inception in 1977 by Bill Wood, 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. Our 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.

With headquarters in Camarillo, California, Wilwood employs approximately 250 people. We have on-shelf stock of more than 300 different brake calipers, 200 rotor designs, 100 master cylinder designs and a wide assortment of brackets, fittings, valves and brake lines. Our off-shelf brake calipers range in size from tiny calipers used on go-carts and light duty industrial equipment, to heavy duty original equipment brakes for the U.S. military Humvee.

Wilwood's engineering department uses the latest computer-aided design and manufacturing techniques in conjunction with finite element analysis, dynamic test and cycle test equipment, to find high-performance and reliability solutions for the most difficult braking tasks. Our extensive inventory of proprietary on-the-shelf components allow us to provide cost-effective solutions for unique brake applications.

Wilwood is ISO 9000 compliant and has extensive experience maintaining quality levels of 100ppm or less for original equipment manufacturers.

Downloads:

Download Name File Size
ds628.pdf397.91KB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Fitment Notes
Chevrolet Corvette 427 2013 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
Chevrolet Corvette Base 2009 - 2013 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
Chevrolet Corvette Base 2005 - 2008 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
C-6 - Base
Chevrolet Corvette Grand Sport 2010 - 2013 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
Chevrolet Corvette Z06 Carbon 2011 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
Chevrolet Corvette Z06 2009 - 2013 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
Chevrolet Corvette Z06 2006 - 2008 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
C-6-Z06 Models
Chevrolet Corvette ZR1 2009 - 2013 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
Chevrolet Corvette 1997 - 2004 KIT,REAR,C5/C6 VETTE,13.00 ROTOR,RACE W/O P-BRAKE; RTR:12.88-IN DIA, GT 48 CURVED VANE, SLOTTED; CLPR:FORGED NARROW SUPERLITE 4R, 4-PISTON, TYPE III ANO
Road Race kits contain high temperature racing pads. Extended low temperature use will cause premature rotor and pad wear.
Kit may fit some 17" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
C-5 & Z06 Models

Specifications:

Details
Part Type Disc Brake Caliper / Rotor / Pad Kit
Kit Summary
Axle Offset 0.00
Caliper Type 4 - Type III Ano
Min Wheel Diameter Req'd* 17
Mount Type Radial
Rear End Axle OEM
Rotor Diameter 12.88
Kit Components & Specs / Rotors
Bedded No
Design Type GT
Dynamically Balanced Yes
Left Hand - Part No 160-13357
Material Spec-37 Iron
Outside Diameter (in) 12.88
Right Hand - Part No 160-13356
Style GT Slotted
Surface Finish Plain
Type GT 48 Curved Vane
Vane Count 48 CV
Width (in) 1.00
Parts & Accessories / Caliper Parts
Bleed Screw Kit 220-0627
Bridge Bolt Kit 230-7710
CrossOver O-Ring Kit 130-10540
O-ring Kit 130-2479
Replacement Piston 1 200-11343
Replacement Piston 2 200-11343
Wear Plate - Left Hand 300-6596
Wear Plate - Right Hand 300-6595
Kit Components & Specs / Rotor Hats
Bolt Circle 1 5 x 4.75
Finish Color Type III Anodize
Hat - Part No 170-12985
Hat Offset Dimension (in) 0.703
Material Aluminum
Stud Diameter - BC 1 0.520
Stud Diameter - BC 2 0.000
Stud Diameter - BC 3 0.000
Type Big Brake Dynamic Hat - Short Offset
Parts & Accessories / Hat
Bolt Kit 230-6656
Kit Components & Specs / Calipers
Brake Pad Area (In²) 8.2
Brake Pad Plate 7416
Brake Pad Volume (In³) 3.8
Finish Color Type III Ano
Left Hand - Part No 120-12602
Mount Type Radial
Pad Compound BP-30
Piston 1 Bore (in) 1.25
Piston 2 Bore (in) 1.25
Piston Area (In²) 2.46
Piston Count 4
Piston Type Thermlock
Right Hand - Part No 120-12602
Type Forged Narrow Superlite 4R
Parts & Accessories / Brake Lines
Front Line Kit 220-8177, 220-9101

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Wilwood Brakes Forged Narrow Superlite 4R Big Brake Rear Brake Kit (Race) 140-10638:
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