Overview
The Baer Brakes Pro Plus rear brake system, part number 4302531R, is a red-caliper rear disc kit for Art Morrison IRS rear suspensions. A six-piston fixed caliper clamps a 14.36 inch vented rotor, and the kit comes with brackets, stainless braided hoses and hardware. Confirm the Art Morrison IRS rear setup before ordering.
Rotors come pre-assembled with NAS high grade stainless hardware. Use the Q020Q template to check clearance against your wheel, and plan for wheels with a minimum diameter of 18.0 inch. The caliper is red, and the unit is made in Phoenix, AZ, at a performance grade.
Key features
- Red powder coated finish on the six-piston caliper
- Staggered pistons designed to reduce uneven pad wear
- Stainless steel pistons, abutments and noise suppression clips
- Dual seals rated for dust, weather and pressure
- Two-piece vented rotor with slotted, drilled, zinc-plated surface
- Billet aluminum hat on the rotor assembly
- CNC machined from US-sourced forged or billet aluminum
Choosing the right setup
A red caliper is a finish choice, and it does not change how the brake works, so the decision should rest on the rear end and wheel fit. Measure the space between the rotor hat and the inside of the wheel before buying, because a larger rotor can reduce clearance on some wheel designs. Wheel offset and backspacing matter as much as diameter when a fixed caliper is installed.
Pad compound and hose routing are other points to plan for. Street driving, towing and trail use each place different heat loads on a rotor, so choose pads suited to how the vehicle is driven. Keep the stainless braided hoses away from moving links and exhaust heat, and check them for rubbing after the first few drives.
- Measure wheel clearance against the rotor hat
- Match pad compound to how the vehicle is driven
- Route hoses clear of moving suspension links
- Check the parking brake parts during installation
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302531R |
| UPC | 844165048824 |
| Caliper | 6P, six pistons, fixed |
| Caliper color | Red |
| Rotor outside diameter (rear) | 14.36 inch |
| Rotor thickness | 1.1 |
| Rotor type | 2-piece, slotted, drilled, zinc plated, vented |
| Minimum wheel diameter | 18.0 inch |
| Brake pad FMSI number | D0731 |
| Template | Q020Q |
| Hose material | Steel braided |
| Hose DOT approved | Yes |
| Park brake included | No, re-uses original equipment |
| Axle | Rear |
| Lug count | 5 lug |
| Wheel bolt pattern | 5x120mm |
| Grade type | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
The kit is built for Art Morrison IRS rear suspensions, which is a rear setup rather than a model year or chassis code. Check your rear setup and the 5x120mm bolt pattern before ordering.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The brackets are supplied with the kit. The parking brake relies on re-used original equipment parts, so keep the factory components and inspect them during assembly. Route the steel braided hoses clear of moving suspension links.
What’s included
Red six-piston fixed caliper, 14.36 inch vented two-piece rotor with pre-assembled NAS stainless hardware, brackets, stainless braided hoses and hardware.
Not included: park brake shoe assembly, which is re-used from the original equipment.
