Wilwood front AERO6 kit components for GM K-Series/Blazer/Jimmy 6-Lug 4x4, black calipers and 15-inch gt slotted rotors
Wilwood front AERO6 assembly for GM K-Series/Blazer/Jimmy 6-Lug 4x4, black caliper and 15-inch gt slotted rotor
Wilwood front AERO6 kit components for GM K-Series/Blazer/Jimmy 6-Lug 4x4, black calipers and 15-inch gt slotted rotors
Wilwood front AERO6 assembly for GM K-Series/Blazer/Jimmy 6-Lug 4x4, black caliper and 15-inch gt slotted rotor

Wilwood Front 15-Inch GT Kit for GM Six-Lug 4x4 (1971–1991) — Black Six-Piston AERO6

SKU: 140-18157

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Product details

This black AERO6 front conversion uses 15-inch GT-slotted Spec-37 rotors on the listed GM six-lug 4x4 models. Its larger rotor diameter demands a wheel-template check in addition to the hub and hydraulic-system preparation. The manufacturer is Wilwood Engineering, founded by Bill Wood in 1977 and based in Camarillo, California. It designs and manufactures disc brake components and complete systems, from calipers and brake rotors to valves, master cylinders, fittings and brake lines. Motorsport, street-performance and specialized installations each require those components to be matched to the complete brake system.

Technical Details

  • Manufacturer part number: 140-18157
  • Service calipers: AERO6; 6 pistons; radial mount; Black Powder Coat
  • Brake rotors: 15.00 x 1.25 inches; Spec-37 Iron; GT Slotted; vented construction
  • Pads: BP-10; piston material: Stainless
  • Caliper body material: Forged aluminum
  • Hydraulic inlet: 1/8-27 NPT
  • Rotor/hat wheel-stud clearance pattern(s): 6 x 5.5 in; 6 x 139.7 mm; match the installed hub/axle pattern
  • Hydraulic brake hoses: not included; select the correct application-specific lines/fittings
  • Wheel clearance: 19-inch wheels may fit; verify the manufacturer’s complete caliper/rotor template for the installed wheel
  • Supplied as one kit with mounting hardware; spindles, hubs, master cylinder and booster are not included

Fitment & Compatibility

Allow for the 15-inch rotor and AERO6 caliper when assessing a listed GM six-lug 4x4 front application. Nominal 19-inch wheels still need a template check. The application table covers selected K-series pickups/Suburbans, Blazer/K5 Blazer and Jimmy vehicles across 1971–1991, with model-specific start and end years.

Follow DS1672 for the hub wheel-stud-hole modification and check the complete hydraulic arrangement. Wilwood recommends a 15/16-inch master cylinder with the factory vacuum booster and pedal; the 1.12-inch original bore causes very high pedal effort and is not recommended. If the rear axle still has drum brakes, include the recommended 10-pound residual valve and a proportioning valve in that circuit. Hydraulic hoses must be purchased separately.

Use the fitment table below to confirm the exact year, model, trim and installation notes.

Manufacturer Resources

WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.

PMB Performance brings over 20 years of experience with brake components and fitment details. Send us your VIN together with the installed axle, spindle, brake and wheel specifications if you need help confirming this package.

Vehicle Applications

Years Make Model Model option Front brakes Rear brakes Kit application Notes
1971-1974, 1987-1991 Chevrolet Blazer 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1971-1991 GMC Jimmy 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1971-1974 GMC K15/K1500 Pickup 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1971-1974 GMC K15/K1500 Suburban 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1975-1986 Chevrolet K10 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1975-1986 Chevrolet K10 Suburban 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1975-1986 Chevrolet K5 Blazer 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1975-1978 GMC K15 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1975-1978 GMC K15 Suburban 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1979-1986 GMC K1500 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1979 GMC K1500 Suburban 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5
1980-1986 GMC K1500 Suburban 4 x 4 Disc Drum Front Kit 1, 2, 3, 4, 5

Application Notes

  1. Caution: A 15/16” bore master cylinder is recommended for proper brake function when installing this brake kit with the factory brake pedal and vacuum booster.
  2. Wilwood offers a 15/16” bore tandem master cylinder suitable for this application, p/n 260-18184
  3. Using the OE 1.12” bore master cylinder is not recommended and will require very high pedal effort to stop the vehicle.
  4. Line kit included (manufacturer): None
  5. Front line-kit reference: 220-18356