Kits in this competition group are configured for use in production category road racing that allow brake upgrades, but limit modifications to four-piston calipers and 12.88” rotors. FSL4R/ST Type III anodize finish calipers use Thermlock pistons to resist fade and extend service life by reducing the heat transfer into the caliper from the pads. HD series directional vane rotors provide high cooling efficiency and durability mounted to the hubs with forged aluminum GT hats. Kits also include high temperature race compound pads, stainless steel flexlines, and premium grade hardware for installation in 17” and larger wheels.
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.
| Download Name | File Size |
| ds1148.pdf | 389.16KB |
| Make | Model | Submodel | Years | Fitment Notes |
| Ford | Mustang | Base | 1994 - 2004 | KIT,FRONT,MUSTANG,1994-04,ROAD RACE FSL4R/ST,HD48 SPEC37,12.88 RTR,W/LINES; RTR:12.88-IN DIA, HD 48 CURVED VANE, SLOTTED; CLPR:FORGED SUPERLITE 6R, 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. |
| Ford | Mustang | Cobra | 1994 - 2004 | KIT,FRONT,MUSTANG,1994-04,ROAD RACE FSL4R/ST,HD48 SPEC37,12.88 RTR,W/LINES; RTR:12.88-IN DIA, HD 48 CURVED VANE, SLOTTED; CLPR:FORGED SUPERLITE 6R, 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. Cobra Models |
| Ford | Mustang | GT | 1994 - 2004 | KIT,FRONT,MUSTANG,1994-04,ROAD RACE FSL4R/ST,HD48 SPEC37,12.88 RTR,W/LINES; RTR:12.88-IN DIA, HD 48 CURVED VANE, SLOTTED; CLPR:FORGED SUPERLITE 6R, 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. |
| Ford | Mustang | Mach 1 | 2003 - 2004 | KIT,FRONT,MUSTANG,1994-04,ROAD RACE FSL4R/ST,HD48 SPEC37,12.88 RTR,W/LINES; RTR:12.88-IN DIA, HD 48 CURVED VANE, SLOTTED; CLPR:FORGED SUPERLITE 6R, 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. |
| Ford | Mustang | 2001 | KIT,FRONT,MUSTANG,1994-04,ROAD RACE FSL4R/ST,HD48 SPEC37,12.88 RTR,W/LINES; RTR:12.88-IN DIA, HD 48 CURVED VANE, SLOTTED; CLPR:FORGED SUPERLITE 6R, 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. Cobra & Bullitt Models Except Independent Rear Suspension |
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| Ford | Mustang | 1999 - 2000 | KIT,FRONT,MUSTANG,1994-04,ROAD RACE FSL4R/ST,HD48 SPEC37,12.88 RTR,W/LINES; RTR:12.88-IN DIA, HD 48 CURVED VANE, SLOTTED; CLPR:FORGED SUPERLITE 6R, 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. Cobra Models Except Independent Rear Suspension |
| Details | |
| Part Type | Disc Brake Caliper / Rotor / Pad Kit |
| Kit Components & Specs / Rotors | |
| Bedded | No |
| Design Type | HD |
| Dynamically Balanced | Yes |
| Left Hand - Part No | 160-12785 |
| Material | Spec-37 Iron |
| Outside Diameter (in) | 12.88 |
| Right Hand - Part No | 160-12784 |
| Style | Plain Face |
| Surface Finish | Plain |
| Type | HD 48 Curved Vane |
| Vane Count | 48 CV |
| Width (in) | 1.25 |
| Parts & Accessories / Caliper Parts | |
| Bleed Screw Kit | 220-0627 |
| Bridge Bolt Kit | 230-5978 |
| CrossOver O-Ring Kit | 130-10540 |
| O-ring Kit | 130-5100 |
| Replacement Piston 1 | 200-7550 |
| Replacement Piston 2 | 200-7553 |
| Wear Plate - Left Hand | 300-5923 |
| Wear Plate - Right Hand | 300-5922 |
| Kit Components & Specs / Rotor Hats | |
| Bolt Circle 1 | 5 X 4.50 |
| Finish Color | Black E-Coat |
| Hat - Part No | 170-6223 |
| Hat Offset Dimension (in) | 0.410 |
| Material | Aluminum |
| Stud Diameter - BC 1 | 0.580 |
| Stud Diameter - BC 2 | 0.000 |
| Stud Diameter - BC 3 | 0.000 |
| Type | Big Brake Hat - Short Offset |
| Parts & Accessories / Hat | |
| Bolt Kit | 230-4572 |
| Kit Components & Specs / Calipers | |
| Brake Pad Area (In²) | 8.2 |
| Brake Pad Plate | 7420 |
| Brake Pad Volume (In³) | 4.9 |
| Finish Color | Type III Ano |
| Left Hand - Part No | 120-13266 |
| Mount Type | Radial |
| Pad Compound | BP-30 |
| Piston 1 Bore (in) | 1.88 |
| Piston 2 Bore (in) | 1.62 |
| Piston Area (In²) | 4.84 |
| Piston Count | 4 |
| Piston Type | Thermlock |
| Right Hand - Part No | 120-13265 |
| Type | Forged Superlite 6R |
| Caliper Type | 4 - Type III Ano |
| Min Wheel Diameter Req'd* | 17 |
| Mount Type | Radial |
| Rotor Diameter | 12.88 |
| Spindle Type | Factory Disc Spindle |
| Parts & Accessories / Brake Lines | |
| Front Line Kit | 220-6458 |
