UMI Performance C5/C6 Front Brake Conversion Hubs - Bearings / Bracket Kit (1978-1988 G-Body) - 304647
Upgrade your G-Body's stopping power with the UMI Performance C5/C6 Front Brake Conversion Kit (304647). Designed to adapt Corvette C5/C6 abutment brackets, calipers, and rotors directly to factory G-Body spindles, this kit includes laser-cut conversion brackets, lightweight USA-made aluminum hubs, premium bearings, races, and rawhide seals.
Featuring dual 5 x 4-1/2" and 5 x 4-3/4" bolt patterns, the design maintains your factory front track width. Rigorously tested on UMI's "Green Machine" and proven in road race and autocross competition, this setup delivers exceptional track-ready performance and reliability.
Features
- Adapts C5/C6 brakes and rotors to 1978-1988 GM G-Body spindles
- Laser-cut UMI conversion brackets for precise alignment
- USA-made aluminum hubs with dual 5 x 4-1/2" and 5 x 4-3/4" bolt patterns
- Mounts C5/C6 brake rotor in the exact factory location without altering front track width
- Premium bearing cups, cones, and correct rawhide seals included
- Compatible with Wilwood SLC56 calipers
- Rigorously tested and proven in road race and auto-x competition
- Anodized finish for superior corrosion resistance
- Designed and manufactured in Philipsburg, PA, USA
- Note: Wheel studs are not included and must be acquired separately. Requires C5 or C6 calipers, rotors, brake pads, and brake lines. Minimum 17" wheel required for C5 brakes; 18" wheel required for C6 brakes. Does not fit Blazer spindles.
Specifications
- SKU / Part Number: 304647
- Manufacturer: UMI Performance
- Vehicle Fitment: 1978-1988 GM G-Body
- Direct Bolt-On: No (Requires cutting and drilling modifications)
- Bolt Patterns: 5 x 4-1/2" and 5 x 4-3/4"
- Finish: Anodized
- UOM: Kit
What's in the Box
- 1 x Pair of UMI Conversion Brackets
- 1 x Pair of USA-Made Aluminum Hubs
- Premium Bearings, Races, and Rawhide Seals
- Installation Hardware Kit
Fitment
Buick:
- 1978 Buick Regal
- 1979 Buick Regal
- 1980 Buick Regal
- 1981 Buick Regal
- 1982 Buick Regal
- 1983 Buick Regal
- 1984 Buick Regal
- 1985 Buick Regal
- 1986 Buick Regal
- 1987 Buick Regal
Chevrolet:
- 1978 Chevrolet El Camino
- 1979 Chevrolet El Camino
- 1980 Chevrolet El Camino
- 1981 Chevrolet El Camino
- 1982 Chevrolet El Camino
- 1983 Chevrolet El Camino
- 1984 Chevrolet El Camino
- 1985 Chevrolet El Camino
- 1986 Chevrolet El Camino
- 1987 Chevrolet El Camino
- 1978 Chevrolet Malibu
- 1979 Chevrolet Malibu
- 1980 Chevrolet Malibu
- 1981 Chevrolet Malibu
- 1982 Chevrolet Malibu
- 1983 Chevrolet Malibu
- 1978 Chevrolet Monte Carlo
- 1979 Chevrolet Monte Carlo
- 1980 Chevrolet Monte Carlo
- 1981 Chevrolet Monte Carlo
- 1982 Chevrolet Monte Carlo
- 1983 Chevrolet Monte Carlo
- 1984 Chevrolet Monte Carlo
- 1985 Chevrolet Monte Carlo
- 1986 Chevrolet Monte Carlo
- 1987 Chevrolet Monte Carlo
- 1988 Chevrolet Monte Carlo
GMC:
- 1978 GMC Caballero
- 1979 GMC Caballero
- 1980 GMC Caballero
- 1981 GMC Caballero
- 1982 GMC Caballero
- 1983 GMC Caballero
- 1984 GMC Caballero
- 1985 GMC Caballero
- 1986 GMC Caballero
- 1987 GMC Caballero
Oldsmobile:
- 1978 Oldsmobile Cutlass
- 1979 Oldsmobile Cutlass
- 1980 Oldsmobile Cutlass
- 1981 Oldsmobile Cutlass
- 1982 Oldsmobile Cutlass
- 1983 Oldsmobile Cutlass
- 1984 Oldsmobile Cutlass
- 1985 Oldsmobile Cutlass
- 1986 Oldsmobile Cutlass
- 1987 Oldsmobile Cutlass
- 1988 Oldsmobile Cutlass
Pontiac:
- 1982 Pontiac Bonneville
- 1983 Pontiac Bonneville
- 1984 Pontiac Bonneville
- 1985 Pontiac Bonneville
- 1986 Pontiac Bonneville
- 1978 Pontiac Grand Prix
- 1979 Pontiac Grand Prix
- 1980 Pontiac Grand Prix
- 1981 Pontiac Grand Prix
- 1982 Pontiac Grand Prix
- 1983 Pontiac Grand Prix
- 1984 Pontiac Grand Prix
- 1985 Pontiac Grand Prix
- 1986 Pontiac Grand Prix
- 1987 Pontiac Grand Prix
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
