BMR MM460H Polyurethane Motor Mount Kit Black for 78-87 GM G-Body Upper & Lower

Vehicle Fitment

• 1978-1987 Buick Regal (All trims, including Grand National, T-Type, GNX)
• 1978-1981 Buick Century (RWD)
• 1978-1983 Chevrolet Malibu (All trims)
• 1978-1987 Chevrolet Monte Carlo (All trims, including SS)
• 1978-1987 Chevrolet El Camino (All trims)
• 1978-1987 GMC Caballero (All trims)
• 1978-1980 Oldsmobile Cutlass Salon
• 1978-1987 Oldsmobile Cutlass Supreme (All trims, including 442, Hurst/Olds)
• 1978-1986 Pontiac Bonneville G
• 1978-1987 Pontiac Grand Prix (All trims)
• 1978-1981 Pontiac Grand LeMans
• 1978-1981 Pontiac LeMans (RWD)

Fitment Notes

• Fits GM G-Body chassis (1978-1987)
• Designed for standard SBC / BBC / LS swap motor mount perches
• Confirm engine block compatibility before install
• 100% bolt-in installation
• Red hammertone version available as MM460R
• Some increase in NVH expected

Features

• Upper and lower polyurethane motor mounts
• MIG-welded 3/16" plate steel construction
• 95-durometer polyurethane bushings
• Grade 8 mounting hardware
• Black hammertone powder coat finish
• Reduces engine deflection
• Improved throttle response
• Quicker reaction times
• More accurate manual shifts
• Suitable for street, drag, and road race
• Minimal NVH increase over stock
• 100% bolt-in design
• Made in USA

Specifications

• Mount type: Upper and lower
• Bushing material: 95-durometer polyurethane
• Steel thickness: 3/16" plate
• Construction: MIG-welded
• Hardware grade: Grade 8
• Finish: Black hammertone powder coat
• Install time: 2-3 hours
• Application: Street, drag, road race

Included Components

• 2x Upper polyurethane motor mounts
• 2x Lower polyurethane motor mounts
• 1x Grade 8 hardware kit
• 1x Installation instructions

Product Description

The BMR MM460H polyurethane motor mount kit replaces the bulky, deflection-prone factory rubber motor mounts on 1978-1987 GM G-Body vehicles with a performance-engineered upper and lower mount set. Stock rubber mounts allow excessive engine movement under load, robbing throttle response, slowing reaction times, and causing inaccurate shifts in manual-equipped cars. BMR's mounts use 95-durometer polyurethane bushings paired with MIG-welded 3/16" plate steel brackets to limit engine deflection while still isolating enough vibration to keep NVH manageable for street driving.

Designed for street performance, drag racing, and road racing applications across any power level, the MM460H is a 100% bolt-in install taking 2-3 hours with basic hand tools. Each kit ships in a durable black hammertone powder coat with Grade 8 mounting hardware. Red hammertone finish available separately as MM460R. Proudly designed and made in the USA.