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Baer Brakes Extreme Plus Brake System Front 73-87 Chevy/GMC 2WD 1/2 Ton Trucks W/Dse Forged Aluminum 2.5 Inch Drop Modular Spindles Black W/Dse Forged Aluminum Modular Spindles – 4301588B

Baer Brakes

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  • Fits 1973–1986 Chevrolet C10 and GMC C15/C1500 pickups and Suburbans, plus 1987 Chevrolet R10 and GMC R1500 models, per the manufacturer list
  • 1-piece Monoblock 6-piston, 6S caliper in Black
  • 14.0 inch two-piece slotted, drilled, zinc-plated vented rotor, 1.25 inch thick
  • Stainless pistons, hoses and rotor hardware, plus mounting brackets
  • Pad type D1247; 2.5 inch drop spindles not included

Description

Overview

The Baer Brakes 4301588B is an Extreme Plus front brake kit with a Black caliper for 1973 to 1987 Chevrolet and GMC C10, C15 and R10 pickups in 2WD 1/2 ton form. The 1-piece Monoblock 6-piston, 6S caliper works with a 14 inch two-piece slotted, drilled, zinc-plated rotor.

Dse Forged Aluminum 2.5 Inch Drop Modular Spindles are not included and must be sourced separately. The calipers and rotors bolt to those spindles. The kit supplies mounting brackets, stainless braided hoses and rotor hardware pre-assembled with NAS high grade stainless fasteners.

Key features

  • 1-piece Monoblock, 6-piston, 6S caliper manufactured in Phoenix, Az
  • CNC machined from U.S. sourced 2618 aluminum forging
  • Powder coated finish
  • Stainless steel pistons, abutments and noise suppression clips
  • Staggered pistons to minimize uneven pad wear
  • Dual seals for dust, weather and pressure
  • Two-piece slotted, drilled, zinc-plated rotor with billet aluminum hat

Before you buy

Front brake upgrades affect more than the stopping hardware. The caliper clamps the rotor, and the pads turn hydraulic pressure into friction, so the spindle, hub, wheel and tire all need to work together. Plan the whole front end at once rather than swapping one part at a time.

Wheel clearance deserves attention before the install. A larger rotor and caliper can reduce room behind the spokes, so check wheel backspacing and offset against the new setup. Heavier wheels and larger tires also add load to the bearings and hub, which makes periodic inspection more important.

  • Check pad wear at every tire rotation
  • Inspect braided hoses for chafing and bulges
  • Re-torque rotor and caliper bolts after the first few drives
  • Keep brake fluid fresh and free of moisture

Specifications

Brand Baer Brakes
Part number 4301588B
UPC 90127853849
Kit type Kit
Axle Front
Drive 2WD
Caliper 1-piece Monoblock, 6-piston, 6S, fixed
Caliper color Black
Rotor type 2-piece, vented, slotted, drilled, zinc-plated
Rotor outside diameter 14.0 inch
Rotor thickness 1.25 inch
Minimum wheel diameter 18.0 inch
Pad FMSI number D1247
Template N072P
Hose material Stainless steel
Lug count 5 lug
Wheel bolt pattern 5×4.75/5×5.00
Spindle type Dse Forged Alum Modular 2.5 Inch Drop Spindles (not included)
Country of origin USA

Vehicle fitment

It fits 1973–1986 Chevrolet C10 and C10 Suburban, 1987 Chevrolet R10 and 1987–1988 R10 Suburban, 1975–1978 GMC C15 and C15 Suburban, 1973–1974 GMC C15/C1500 and Suburban, 1979–1986 GMC C1500 and Suburban, and 1987 GMC R1500 and 1987–1988 R1500 Suburban.

Vehicles not on that list are outside this kit’s coverage, and the 2WD setting rules out four-wheel-drive trucks. Confirm your vehicle’s year, model and trim before ordering.

Installation notes

Plan the spindle purchase before the brake install, since the calipers and rotors bolt to the modular spindles. Use template N072P to check wheel clearance, as Baer cannot promise fit to every wheel style. Brakes are safety equipment, so a qualified installer should handle the job.

What’s included

The package contains the 6S Black caliper, two-piece rotors with pre-assembled stainless hardware, mounting brackets, stainless braided hoses and hardware.

Not included: the 2.5 inch drop modular spindles and wheels.

Specification

Shipping weight 75 lbs
Package dimensions 16.25 × 15.5 × 15.5 in
brands

Sold as

Kit

Wheel bolt pattern (in)

5×4.75/5×5.00

Lug nuts

5 Lug

Rotor type

2-Piece

Country of origin

USA

Fitment

VehicleYearsTrims
Chevrolet C101973–1986All
Chevrolet C10 Suburban1973–1986All
Chevrolet R101987All
Chevrolet R10 Suburban1987–1988All
GMC C151975–1978All
GMC C15 Suburban1975–1978All
GMC C15/C15001973–1974All
GMC C15/C1500 Suburban1973–1974All
GMC C15001979–1986All
GMC C1500 Suburban1979–1986All
GMC R15001987All
GMC R1500 Suburban1987–1988All

Use “Select your vehicle” at the top of the page to check this part against your vehicle.

Questions & Answers

Are the modular spindles part of the 4301588B kit?

No. Spindles are not included with the kit. Dse Forged Aluminum 2.5 Inch Drop Modular Spindles must be sourced separately before the brake package is installed.

Does this kit fit a 1990 Chevy C1500?

Coverage is limited to 1973 through 1987 Chevrolet and GMC C10, C15 and R10 pickups, plus named Suburban and 1987 to 1988 R-series models. Confirm fit for your vehicle's year, model and trim before ordering.

What is the caliper type on the 4301588B?

It is a 1-piece Monoblock caliper with six pistons, designated 6S, and it is a fixed caliper. The caliper is finished in Black.

What is the rotor size?

The rotor measures 14.0 inch in outside diameter and 1.25 inch thick. It is a two-piece vented, slotted, drilled and zinc-plated design, and the minimum wheel diameter is 18.0 inch.

How often should the brake pads be inspected on this kit?

Inspect the pads at every tire rotation or at least once a season. Look for thin friction material, uneven wear and glazing on the rotor surface. Replace pads in pairs on each axle so braking force stays balanced from side to side.

Should the brake fluid be changed when the kit is installed?

Yes, it is a sensible time to flush the fluid. New lines and calipers introduce fresh surfaces, and old fluid absorbs moisture over time. Use the fluid type your master cylinder requires and follow a proper bleeding sequence.

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