Overview
The Baer Brakes 4302270CY is an Extreme Plus rear disc brake kit in Comp Yellow for rear ends with a GM small pattern 10/12 bolt bearing-on-axle flange and 5×4.75 or 5×5.00 inch wheel bolt patterns. It combines a 1-piece Monoblock, 6-piston, 6S caliper with a 14 inch, 2-piece slotted, drilled, zinc-plated rotor, and it suits owners who want a complete rear package with the park brake built into the backing plate.
The 14 inch Extreme Plus fits wheels 18 inch or larger. The rotor has a billet aluminum hat, and the 6S caliper is CNC machined from 2618 aluminum forging with stainless steel pistons and noise suppression clips. Baer’s backing plate serves as the caliper mount and houses a modern 1-piece park brake shoe assembly. Stainless braided hoses and stainless hardware are included.
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 dust/weather and pressure seals
- 2-piece slotted, drilled, zinc-plated rotor with billet aluminum hat
- Rotors pre-assembled with NAS high grade stainless hardware
Before you install
Rear disc kits like this one take over the stopping job from the drum or older disc setup, so the wheel, hub and backing plate all have to work together. Before ordering, measure the axle flange and count the bolts, then compare the wheel’s backspacing and inner clearance against the rotor and the caliper body. Larger rotors often need a wheel with more open spokes, so a quick mock-up with the template helps.
Park brake cable routing is often the step that takes the most planning. Cable length, anchor points and the way the lever connects to the backing plate vary between vehicles, so lay out the path before the hub goes back on. Route brake lines away from exhaust heat and moving suspension parts, check the stainless braided hoses for rub points after the first test drive, and recheck lug nut torque after the first few stops.
- Measure the axle flange and bolt count before ordering
- Mock up the rotor and caliper against the wheel
- Plan park brake cable routing in advance
- Inspect braided hoses for chafing after installation
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302270CY |
| UPC | 90127951590 |
| Caliper | 6S, 1-piece Monoblock, 6 pistons, fixed |
| Caliper color | Comp Yellow |
| Rotor outside diameter | 14.0 inch |
| Rotor construction | Vented, 2-piece slotted, drilled, zinc plated |
| Rotor thickness | 1.25 |
| Brake pad FMSI number | D1247 |
| Axle | Rear |
| Axle flange | GM small pattern 10/12 bolt bearing on axle (Buick/Olds/Pontiac) |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 18.0 inch |
| Hose material | Stainless steel |
| Park brake | Included; park brake cables not included |
| Template | N110P |
| Emission code | 6 |
| Grade type | Performance |
| Sold as | Kit |
| Country of origin | USA |
Vehicle fitment
Fit is matched by axle flange and wheel bolt pattern rather than by vehicle. It is built for the GM small pattern 10/12 bolt bearing-on-axle flange used on Buick, Olds and Pontiac rear ends, with 5×4.75/5×5.00 bolt patterns. Confirm the flange and bolt pattern of your axle before ordering.
Other rear axle flanges and bolt patterns are not covered. Baer cannot guarantee fit into every wheel style, so compare the N110P template against your wheel. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Lay the N110P template against the wheel you plan to run to check clearance around the 14 inch rotor and 6S caliper before mounting. Rotors arrive pre-assembled with NAS high grade stainless hardware, and the park brake shoe assembly is already set inside the backing plate. Because park brake cables are not part of this kit, plan the cable routing for your vehicle in advance. A qualified brake shop should handle the installation.
What’s included
The kit includes the 6S Monoblock caliper, the 14 inch 2-piece slotted, drilled, zinc-plated rotor with billet aluminum hat, the Baer backing plate with its 1-piece park brake shoe assembly, and stainless braided hoses with hardware.
Not included: park brake cables.
