Overview
The Baer Brakes Extreme Plus rear brake kit, part 4302270GB in Grabber Blue, is designed for GM small-pattern 10/12 bolt bearing-on-axle housing ends, with the Buick, Olds and Pontiac axle flange. The wheel bolt pattern is 5×4.75/5×5.00 with five lugs, and the housing ends are non-flush mount.
A one-piece monoblock six-piston caliper, designated 6S, clamps a two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat. Staggered pistons help limit uneven pad wear, and the pad type is D1247. The minimum wheel diameter is 18.0 inch.
Key features
- One-piece monoblock six-piston fixed caliper with a Grabber Blue finish.
- Staggered pistons designed to reduce uneven pad wear.
- Stainless steel pistons, abutments and noise suppression clips.
- Caliper body CNC machined from US-sourced 2618 aluminum forging.
- Two-piece slotted, drilled and zinc-plated rotor with billet aluminum hat.
- Rotors are pre-assembled with NAS high grade stainless hardware.
- Stainless braided hoses and hardware are included.
Brake fluid and bleeding
Hydraulic brakes depend on clean, dry fluid. Moisture in old fluid lowers its boiling point, which can cause a soft pedal under repeated hard stops. Flush the system with fresh fluid when new calipers or hoses are installed, and bleed each corner in the order given by the vehicle’s service procedure.
Air in the lines is the most common cause of a spongy pedal after a brake job. Bleed until the fluid runs clear of bubbles, and check that the bleeder screws are tight and the caps are clean. Keep fluid off paint, since it can damage the finish. Inspect hoses for chafing where they pass near suspension parts.
Keep the rotor surfaces free of grease and fluid during installation. A light cleaner and a clean shop cloth are enough. Once the system is bled, bed in the pads with moderate stops before any sustained braking on a steep grade.
- Use the fluid type marked on the master cylinder cap
- Inspect braided hoses for chafing at each service
- Replace brake fluid on a regular service interval
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302270GB |
| UPC | 90127951637 |
| Sold as | Kit |
| Caliper | 6S |
| Caliper color | Grabber Blue |
| Caliper type | Fixed |
| Caliper piston quantity | 6 |
| Rotor outside diameter | 14.0 inch |
| Rotor construction | Vented |
| Rotor type | 2-piece |
| Rotor thickness | 1.25 |
| Surface type | Slotted, drilled and zinc plated |
| Axle | Rear |
| Axle flange | GM small pattern 10/12 bolt bearing on axle (Buick/Olds/Pontiac) |
| Housing end | Non-flush mount |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 18.0 inch |
| Pad FMSI number | D1247 |
| Hose material | Stainless steel |
| Park brake | Included (park brake cables not included) |
| Template | N110P |
| Grade type | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
Its axle flange is the GM small-pattern 10/12 bolt bearing-on-axle type with a 5×4.75/5×5.00 pattern. Measure your axle flange and hub against those dimensions before mounting.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The 14-inch rotor calls for a wheel of 18 inches or larger, so check clearance with template N110P first. Hardware on the rotors is already installed, and park brake cables must be obtained separately because they are not included.
What’s included
Included are the Grabber Blue 6S six-piston caliper, the 14-inch two-piece rotor with billet aluminum hat, the park brake shoe assembly in the backing plate, stainless braided hoses and stainless hardware.
Not included: park brake cables.
