UMI Performance · New
UMI Performance 78-88 GM G-Body C5/C6 Front Brake Conversion Brackets
MPN 3046 · Store SKU umi3046
Supplier stock checked 11/7/2026, 8:34:45 AM UTC. Adding a part does not reserve it.
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Product details
The UMI P/N 3046 brake conversion bracket is designed to mount 1997-2013 C5 or C6 front calipers and rotors to the 1978-1988 GM G-Body factory spindle. Conversion brackets are CNC laser cut from 3/8” thick mild steel and feature a heavy duty black powder coat finish. Each kit includes Grade 10.9 mounting hardware and complete detailed installation instructions. Supplied installation instructions included detailed list of GM part numbers needed to complete the brake grade upgrade. 17” wheels needed for C5 brakes and 18” wheels for C6. As with all UMI Performance products, these brackets are 100% manufactured, tested and raced out of Philipsburg, PA – USA. Note: Requires slight modification to factory spindle. Installation requires a hub. Hub can be a GM G-Body rotor turned down or Wilwood P/N 270-12304. All other items needed to complete the installation are GM P/N’s. Instructions include detailed P/N list. Uses turned down GM G-Body hub/rotor or Wilwood 270-12304. Wilwood hubs available from UMI Performance. Adapts C5/C6 caliper to factory spindle. Slight modification of spindle required. Used on UMI’s Green Machine Monte Carlo. Track tested in brutal conditions. Kit includes brackets, bracket mounting hardware and detailed instructions. 3046 - 1978-1988 GM G-Body C5/C6 Front Brake Conversion Brackets 1978-1988 GM G-Body C5/C6 Front Brake Conversion Brackets CNC laser cut 3/8” thick mild steel. Beautiful gloss black powder coat. Grade 10.9 mounting hardware. Features and benefits:
Manufacturer fitment & guides
Check 3046 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
