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Product Summary

GM 8.875 Inch 12-Bolt Car, Rear Position, Powder Coated

  • Forged Narrow Superlite 4R rear disc kits provide the ultimate Big Brake solution for popular muscle car rear axles that require a parking brake
  • 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 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
  • Optional caliper finishes and rotor designs allow builders to personalize the style and performance for every application

Key Specs

PositionRear
Bolt Pattern5 on 4.5" | 4.75"
Rotor Diameter12.88 Inch
Rotor TypeVented
Caliper PistonsFour

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Wilwood 140-9215 Details

  • Forged Narrow Superlite 4R rear disc kits provide the ultimate Big Brake solution for popular muscle car rear axles that require a parking brake
  • 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 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
  • Optional caliper finishes and rotor designs allow builders to personalize the style and performance for every application

Wilwood 140-9215 Specifications

KEY SPECS
MFG. Part #140-9215
BrandWilwood
PositionRear
Bolt Pattern5 on 4.5" | 4.75"
Rotor Diameter12.88 Inch
Rotor TypeVented
Caliper PistonsFour
Caliper FinishPowder Coated
ColorBlack
Parking Brake ProvisionYes
Minimum Recommended Wheel Diameter17 Inch
Hardware IncludedYes
Rotor StyleDrilled & Slotted
Front Rotor IncludedNo
Front Caliper IncludedNo
Rear Caliper IncludedYes
Front Spindles IncludedNo
Master Cylinder IncludedNo
Brake Booster IncludedNo
Brake Hoses IncludedNo
Rear Rotor IncludedYes
GENERAL
Rotor Thickness1.1"
Sold in QuantityKit
NotesDesign for Special End or C-Clip Eliminator modifications.
Offset2.81"
Axle Flange Offset2.81"
Mount TypeRadial
Total Piston Area1.96 sq. in.
Piston TypeStainless
Pad Area8.20 sq. in.
Pad Volume3.80 cu. in.
Brake Pad CompoundBP-10
Caliper TypeRadial
Rotor FinishPlain
Rotor Material TypeSpec-37 Iron
Vane Count48 Curved Vane
BeddedNo
BalancedYes
Hat TypeParking Brake Hat- Standard
Hat FinishBlack E-Coat
Hat Bolt Circle 35 x 5.00
Hat Bolt Circle 25 x 4.75
Hat Bolt Circle 15 x 4.50
Hat Material TypeIron
Hat Offset Dimension1.95"
GTIN Code889545030884
Brake Lines IncludedNo
Caliper ColorBlack
Caliper Material TypeForged Aluminum
Parking Brake StyleIntegral caliper
Rear Caliper ColorBlack
Rear Caliper MaterialForged billet aluminum
Rear Caliper Piston QuantityFour
Rear Rotor ConstructionVented
Rear Rotor Diameter12.9"
Rear Rotor StyleSolid surface
Rear Rotor Thickness1.1"