Overview
Comp Yellow is the finish on Baer Brakes part 4301391CY, an Extreme Plus front brake system for 2WD 1/2-ton Chevrolet and GMC C10-series trucks from 1960 to 1986. The kit pairs a 1-piece monoblock 6-piston caliper with a 14-inch two-piece slotted, drilled and zinc-plated rotor, and it is intended for use with a 2.5-inch drop modular spindle on a 6-lug, 6×5.50-inch bolt pattern.
Because the minimum wheel diameter is 18.0 inches, this kit is meant for trucks on 18-inch or larger wheels. GMC entries and Chevrolet entries both appear in the fitment section below, so check your model against it.
Key features
- Monoblock design: one 6S caliper body with six pistons, CNC machined from US-sourced 2618 aluminum forging
- Stainless steel pistons, abutments and noise suppression clips
- Pistons are staggered to even out pad wear
- Dual seals guard against dust, weather and pressure
- Two-piece, slotted, drilled and zinc-plated rotor with a billet aluminum hat and NAS high-grade stainless hardware
- Billet aluminum hubs arrive assembled with premium bearings packed in Redline synthetic grease
- Powder-coated Comp Yellow caliper; pads use the popular D1247 type
- Stainless braided hoses and mounting brackets are part of the package
Choosing the right setup
The setup is only as good as the parts around it. Because the spindle is a separate purchase, match it carefully to the hub and steering components already on the truck. Pay attention to how the spindle sits against the existing front axle geometry, and make sure the chosen wheels leave room for the caliper body.
Pads and hoses are worth checking as a set. Pads wear at different rates depending on driving style, and worn pads should be replaced in pairs so braking stays even from side to side. Braided hoses should be looked over at every brake service for chafing near suspension parts.
- Match wheel backspacing to caliper clearance
- Replace worn pads in pairs
- Inspect hoses for chafing at each service
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301391CY |
| UPC | 90127877241 |
| Sold as | Kit |
| Caliper | 6S, 1-piece monoblock, 6 pistons, fixed |
| Caliper color | Comp Yellow |
| Caliper material | CNC machined 2618 aluminum forging |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.25 |
| Rotor construction | Vented, two-piece, slotted, drilled, zinc plated |
| Pad type (FMSI) | D1247 |
| Template | N117P |
| Lug count | 6 |
| Wheel bolt pattern | 6×5.50 inch |
| Wheel stud size | 1/2-20 x 2.25 inch |
| Minimum wheel diameter | 18.0 inch |
| Spindle type | Cpp nodular iron 2.5 inch drop |
| Spindles included | No |
| Hose material | Stainless steel |
| Drive / axle | 2WD / front |
| Grade | Performance |
| Country of origin | USA |
Vehicle fitment
GMC entries run 1966 GMC 1000, 1960-1965 GMC 1000 Series, 1975-1978 GMC C15, 1967-1974 GMC C15/C1500 and 1979-1986 GMC C1500. Chevrolet entries are 1960-1986 C10 pickups, 1967-1986 C10 Suburbans, and Suburbans for 1960-1966 and 1987-1989.
Trucks from other years are not covered, such as 1987 and later GMC C1500 models. The kit fits 2WD trucks only. Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
Spindles are not included, so the 2.5-inch drop modular spindle the kit is built around must be sourced separately. Rotors arrive pre-assembled, and the hubs come with bearings already packed. Use the N117P template to compare wheels before fitting, since wheel styles vary in how well they clear the caliper. A qualified installer should handle the hydraulic lines.
What’s included
The kit contains the Comp Yellow 6S monoblock caliper, two-piece rotors pre-assembled with stainless hardware, billet aluminum hubs with bearings and dust caps, mounting brackets, stainless braided hoses and hardware.
Not included: 2.5-inch drop modular spindles.
