Overview
The Baer Brakes Extreme Plus rear brake kit, part 4302270HO in Hugger Orange, is a rear disc brake kit for GM small-pattern 10/12 bolt bearing-on-axle housing ends, the Buick, Olds and Pontiac flange design. The rear hub uses a 5×4.75/5×5.00 bolt pattern with five lugs.
The center of the system is a one-piece monoblock six-piston caliper, the 6S, mounted to a 14-inch two-piece rotor. The rotor is slotted, drilled and zinc plated with a billet aluminum hat, and the pads are D1247. The minimum wheel diameter is 18.0 inch.
Key features
- One-piece monoblock six-piston fixed caliper in Hugger Orange.
- Staggered piston layout to help pads wear evenly.
- Stainless steel pistons, abutments and noise suppression clips.
- Caliper from US-sourced 2618 aluminum forging, CNC machined and powder coated.
- Two-piece slotted, drilled and zinc-plated rotor with billet aluminum hat.
- Rotors come pre-assembled with NAS high grade stainless hardware.
- Stainless braided hoses and hardware included with the kit.
Pad selection and bedding
Pad material changes how the brake feels and how fast the rotor wears. Harder compounds last longer and produce less dust but need more heat to grip well, while softer compounds bite sooner and wear faster. Choose pads for the way the vehicle is used, on trail, on pavement, or both, and keep the same compound on both sides of the axle.
New pads need bedding before they perform at full strength. Make a series of moderate stops to lay an even layer of friction material on the rotor, then avoid holding the brake at a stop until the system cools. Uneven transfer can cause vibration and pulling, so bed in the pads carefully.
Park brake cables are not included with this kit, so existing cables usually stay in use. Check them before a trail season: look for fraying, corrosion, stiff movement and a lever that does not hold. A parking brake that cannot hold the vehicle on a slope needs attention before the vehicle is driven.
- Keep pad compound the same on both rear wheels
- Replace pads before the backing plate contacts the rotor
- Check the caliper for free movement after each pad change
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302270HO |
| UPC | 90127951651 |
| Sold as | Kit |
| Caliper | 6S |
| Caliper color | Hugger Orange |
| 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
The design matches the GM small-pattern 10/12 bolt bearing-on-axle flange and a 5×4.75/5×5.00 hub. Check both against your rear axle and hub before mounting.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Because the rotor is 14 inches, the wheel must be at least 18 inches in diameter. Compare the N110P template with the wheel before mounting. The rotors ship pre-assembled with stainless hardware, and park brake cables are not included.
What’s included
The kit includes the Hugger Orange 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.
