Vehicle Fitment

  • 1978–1988 GM G‑Body (Buick Regal, Chevy El Camino, Chevrolet Malibu, Monte Carlo; GMC Caballero; Olds Cutlass; Pontiac Bonneville & Grand Prix) with Chevy small‑block V8 engines

Features

  • Direct bolt‑in replacement for factory rubber/clamshell motor mounts
  • Polyurethane bushings for enhanced torque resistance and reduced NVH
  • 3/16″ steel bracket construction with black powder‑coat finish
  • Heavy‑duty design for high‑performance street and mild track use
  • Works with standard small‑block SBC engine applications
  • Includes both engine‑side and chassis‑side mount locations
  • Grade 8 mounting hardware included, torque spec 40 ft‑lb
  • Made in the USA with U.S.‑sourced materials and CNC fabrication

Specifications

  • Material: 3/16″ mild steel brackets, polyurethane bushings
  • Finish: black powder coat
  • Bushing type: poly with zinc‑plated anti‑crush sleeve
  • Mount placement: left and right chassis and engine sides
  • Torque spec: 40 ft‑lb per hardware
  • Compatibility: Chevy small‑block V8 (SBC), GM G‑Body 1978–1988
  • Noise/Vibration/Harshness: reduced vs factory rubber, less than solid steel
  • Emissions/legal: no modification to emissions systems

Included Components

  • 1x left engine‑side mount bracket
  • 1x right engine‑side mount bracket
  • 2x chassis‑side mount brackets
  • 4x polyurethane bushings with anti‑crush sleeves
  • Grade‑8 mounting hardware set (bolts, washers, nuts)

Product Description

The UMI Performance 90071 SBC Polyurethane Engine Mount Kit is precision-engineered to replace worn factory rubber or clamshell mounts on GM G‑Body vehicles from 1978 through 1988. Designed for Chevy small‑block engines, this kit features durable polyurethane bushings and 3/16″ steel brackets with a black powder-coat finish for both enhanced strength and corrosion resistance. Installation is a direct bolt-in procedure using the included grade‑8 hardware and torque specification of 40 ft‑lb.

This heavy-duty yet NVH-conscious solution delivers improved engine stability under aggressive driving without the harshness of solid mounts, making it ideal for high-performance street builds or mild track use. Completely Made in the USA using U.S.-sourced materials, the 90071 kit strikes the perfect balance between performance and daily-driving comfort for classic G‑Body musclecar owners.



Primary Product Image