Product Summary

Front Position, Dual: 5 on 4.5" | 4.75" Bolt Pattern

  • Specifically designed for the 1974-1980 Ford Pinto/Mustang II
  • 12.88" rotor is designed to clear 17"-up wheels
  • Features 4 piston calipers that are powder coated red for added rust protection
  • Designed to bolt on the OEM spindles
  • A drilled and slotted design allows for excellent heat dissipation

Key Specs

Bolt PatternDual: 5 on 4.5" | 4.75"
Rotor Diameter12.88 Inch
Rotor TypeVented
Caliper PistonsSix

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Wilwood 140-12275-DR Details

FNSL6R Billet Forged six-piston calipers with 12.88" diameter, 1 piece rotor and hats kits deliver the cost effective combination for braking power and style in this group of kits engineered for traditional non-ABS spindles on American muscle cars and vintage rods. Built exclusively for 17" and larger wheels, FNSL6 kits enhance tire and suspension upgrades on all types of custom show and high performance dual-purpose street and track machines. A full range of options for caliper finishes and rotor designs are guaranteed to catch the eye of the most discriminating enthusiast while providing optimized brake performance for every individual application.


1974 Ford Mustang II All
1974 Ford Pinto All
1975 Ford Mustang II All
1975 Ford Pinto All
1975 Mercury Bobcat All
1976 Ford Mustang II All
1976 Ford Pinto All
1976 Mercury Bobcat All
1977 Ford Mustang II All
1977 Ford Pinto All
1977 Mercury Bobcat All
1978 Ford Mustang II All
1978 Ford Pinto All
1978 Mercury Bobcat All
1979 Ford Pinto All
1979 Mercury Bobcat All
1980 Ford Pinto All
1980 Mercury Bobcat All


Wilwood 140-12275-DR Specifications

MFG. Part #140-12275-DR
Bolt PatternDual: 5 on 4.5" | 4.75"
Rotor Diameter12.88 Inch
Rotor TypeVented
Caliper PistonsSix
Caliper FinishPowder Coated
Parking Brake ProvisionNo
Minimum Recommended Wheel Diameter17 Inch
Spindle TypeDrop & Factory Disc Spindles
Rotor StyleDrilled & Slotted
Front Rotor IncludedYes
Front Rotor Diameter12.88 Inch
Front Caliper IncludedYes
Front Caliper Piston Quantity6
Front Caliper FinishPowder Coated Red
Rear Caliper IncludedNo
Front Spindles IncludedNo
Master Cylinder IncludedNo
Brake Booster IncludedNo
Rear Rotor IncludedNo
Speedway Motors Catalog Part #835-14012275DR
Rotor Thickness1.1"
Stud Diameter1/2-20
Mount TypeRadial
OE Hub Offset0.55"
Total Piston Area4.04 sq. in.
Piston TypeStainless
Pad Area8.20 sq. in.
Pad Volume3.8 cu. in.
Brake Pad CompoundBP-10
Caliper TypeForged Narrow Superlite 6R
Rotor FinishBlack E-Coat
Rotor Material TypeCast Iron
Vane Count34 Straight Vane
Stud Diameter 21/2-20
GTIN Code889545015850