Overview
The Baer Brakes 4302477B is a black Pro Plus rear brake system kit for the 1992–1993 GMC Typhoon, supplied with the original equipment rear end housing. It combines a six-piston caliper with a two-piece drilled rotor on a billet aluminum hat, and the rotor is 14 inch in diameter.
Baer Brakes assembles the rear hubs before they leave the factory. Bearings and races are installed and packed with Redline synthetic grease, so the system is meant to bolt straight onto the control arms. The kit is sold as a kit with a box count of 2, and Baer’s wheel guidance says fit depends on the chosen wheel, so compare the template with the wheel before mounting.
Key features
- Black powder coated finish
- Two-piece 6P, six-piston caliper manufactured in Phoenix, Az
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons that help reduce uneven pad wear
- Dual seals resist dust, weather and pressure
- Two-piece slotted, drilled, zinc-plated rotor on a billet aluminum hat
- Hubs pre-assembled with bearings and races packed with Redline synthetic grease
Wheel clearance and tire choice
Wheel clearance is the first thing to settle when a rear brake system goes on, because the caliper and rotor take up space inside the wheel. Fitment depends on the wheel’s back spacing, center bore and bolt pattern as well as the caliper body. Test-fitting a wheel before mounting a tire prevents surprises once the truck is back on the ground.
Tire size also matters. A larger or wider tire can rub the caliper or the inner fender when the suspension compresses, and a tight-fitting tire can hide a caliper that sits too close to the rim. Choose a wheel that gives room for the caliper body and rotor hat, and check that the lug nuts seat fully on the wheel’s taper.
- Confirm the center bore fits the hub
- Check backspacing against caliper clearance
- Tighten lug nuts in a star pattern
- Recheck wheel fasteners after the first few miles
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302477B |
| UPC | 844165047186 |
| Sold as | Kit |
| Axle | Rear |
| Caliper | 6P, six-piston |
| Caliper color | Black |
| Caliper body | CNC machined from forged or billet aluminum |
| Pistons | Stainless steel |
| Finish | Powder coated |
| Rotor | Two-piece slot, drilled, zinc-plated |
| Rotor hat | Billet aluminum |
| Rotor diameter | 14 inch |
| Rotor surface | SDZ |
| Minimum wheel diameter | 18.0 inch |
| Template | Q110P |
| Box count | 2 |
| Country of origin | USA |
Vehicle fitment
The manufacturer fitment list covers the 1992–1993 GMC Typhoon with the rear Pro Plus system and original equipment rear end housing. Baer advises comparing the Q110P template with the chosen wheel to confirm clearance.
Other GMC and Chevrolet trucks are not on this list, and other Typhoon years are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The hubs arrive assembled, so the main job is mounting the rear assembly to the control arms as Baer describes. Check the wheel against the Q110P template first and confirm it clears the 18.0 inch minimum wheel diameter. Brake work is safety-critical, so have a qualified technician complete the installation and test the brakes before the vehicle is driven.
What’s included
The package is a complete rear brake system sold as a kit, with a box count of 2. The hubs come with bearings and races already installed and packed with Redline synthetic grease, and the black caliper and rotor hat are part of the assembly.
