UMI Performance 1978-1988 GM G-Body Heavy Duty Engine Side Mounts (SBC) - 90058

Fits select 1978-1988 Buick Regal, Chevrolet El Camino, Malibu, Monte Carlo, GMC Caballero, Oldsmobile Cutlass, and Pontiac Grand Prix or Bonneville (SBC Engines).

UMI Performance P/N 90058 heavy-duty engine mounts replace the bulky factory clamshell mounts in GM G-Body applications. These mounts position a Small Block Chevy (SBC) in the precise factory location while providing a significantly more rigid foundation for high-horsepower builds. Constructed from 3/16-inch laser-cut steel and finished in a durable gloss black powder coat, these brackets are engineered to withstand the stresses of drag racing and high-performance street use.

When paired with UMI P/N 90051 solid motor mounts, these brackets help eliminate engine rotation, improving throttle responsiveness and creating essential clearance for large header primaries or turbocharger plumbing. While ideal for racing applications where packaging is tight, please note that solid mounting increases Noise, Vibration, and Harshness (NVH) compared to rubber alternatives.

• Replaces factory clamshell mounts for a more compact and durable setup
• Maintains exact factory engine height and location for SBC engines
• Fabricated from heavy-duty 3/16-inch laser-cut steel
• Includes Grade 8 mounting hardware for maximum strength
• Durable gloss black powder coat finish
• Compatible with UMI 90051 solid mounts or factory-style rubber mounts
• Proudly manufactured, tested, and raced in Philipsburg, PA - USA
• Manufacturer Part Number: 90058

Note: These mounts are specifically designed for Chevrolet Small Block engines and may not work with Oldsmobile or Pontiac powerplants.