Overview
The Baer Brakes Extreme Plus front brake system, part number 4301391S in silver, is a 14-inch disc brake kit with a one-piece monoblock six-piston 6S caliper for half-ton 2WD Chevrolet and GMC C10 and C15 trucks. It is designed for six-lug trucks with a 6 x 5.50 inch bolt pattern.
This kit works only with CPP nodular iron 2.5-inch drop spindles, which Baer does not include. Obtain those spindles first, then confirm rotor and caliper clearance against an 18-inch or larger wheel before the truck goes back on the road.
Key features
- One-piece monoblock six-piston 6S caliper manufactured in Phoenix, Arizona
- Caliper body CNC machined from U.S.-origin 2618 aluminum forging
- Powder coated silver finish
- Staggered pistons help even out pad wear
- Dual seals for dust, weather and pressure
- Two-piece slotted, drilled and zinc-plated rotor with a billet aluminum hat
- Rotors arrive preassembled with NAS high grade stainless hardware
- Billet aluminum hubs with premium bearings packed with Redline synthetic grease and billet dust caps
- Stainless steel braided hoses
Drop spindle setup
A drop spindle lowers the hub and changes the geometry the front end was built around, so alignment after installation matters as much as the brake hardware. Tie rod ends, ball joints and steering arms should be inspected while the front end is apart, since worn parts tend to show up once the ride height changes.
Choosing a spindle that matches the kit is the first step. Calipers and rotors are sized around the spindle mounting points, so a mismatch can cause rubbing or uneven pad contact. Confirm the spindle type matches the kit before ordering, and keep the paperwork with the installation records.
- Get a four-wheel alignment after installation
- Check brake hose length at full steering lock
- Inspect ball joints and tie rod ends for play
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301391S |
| UPC | 844165041030 |
| Caliper | 6S, one-piece monoblock, six-piston, fixed |
| Caliper color | Silver |
| Rotor outside diameter | 14.0 inch |
| Rotor construction | Two-piece, vented, slotted and drilled |
| Rotor material | Iron with aluminum hat |
| Brake pad FMSI number | D1247 |
| Drive | 2WD |
| Axle | Front |
| Lug count | 6 |
| Wheel bolt pattern | 6 x 5.50 inch |
| Wheel stud size | 1/2-20 x 2.25 inch |
| Minimum wheel diameter | 18.0 inch |
| Hose material | Stainless steel |
| Spindle type | CPP nodular iron 2.5-inch drop spindle |
| Spindles included | No |
| Lug nuts included | No |
| Template | N117P |
| Grade | Performance |
| Country of origin | US |
Vehicle fitment
The manufacturer fitment list places this kit on 1960–1986 Chevrolet C10 trucks, 1967–1986 Chevrolet C10 Suburbans, 1960–1966 and 1987–1989 Chevrolet Suburbans, the 1966 GMC 1000, 1960–1965 GMC 1000 Series trucks, 1975–1978 GMC C15 models, 1967–1974 GMC C15/C1500 models and 1979–1986 GMC C1500 models.
Every listed application is 2WD, so four-wheel-drive trucks are outside this kit. Chevrolet C10 pickups after 1986 are not on the list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Because the kit does not include spindles, the CPP nodular iron 2.5-inch drop spindle must be in hand before the caliper and hub assembly can be fitted. The rotors come with NAS high grade stainless hardware already installed. Lug nuts are not included, so supply six nuts that suit 1/2-20 studs. A brake system this size is best installed by a shop familiar with drop spindle work.
What’s included
The kit includes the front rotor, the 6S monoblock caliper, billet aluminum hubs with bearings and billet dust caps, mounting brackets, stainless braided hoses and the included hardware.
Not included: the CPP nodular iron 2.5-inch drop spindles and lug nuts.
