BMR Suspension FR461 Rear Frame Notch Kit for 78-87 GM G-Body 5/8-

Vehicle Fitment

• 1978-1987 Buick Grand-National & Regal (GM G-Body)
• 1978-1987 Chevrolet Monte Carlo, El-Camino, Malibu (GM G-Body)
• 1978-1987 Oldsmobile Cutlass (GM G-Body)
• 1978-1987 Pontiac Grand Prix (GM G-Body)

Fitment Notes

• Rear upper frame rail notch kit providing up to 5/8- additional clearance for wider tires
• Requires removal and welding of the outer frame rail - included bare plates must be welded in place
• Installation recommended for experienced fabricators only; takes approximately 7-8 hours

Features

• Laser-cut 3/16- steel plate designed to narrow frame rails
• Provides sufficient clearance to tuck a 275/60R15 radial tire
• Bare finish allows custom finishing or welding prep
• Backed by BMR's reputation for precision chassis modifications
• Engineered in the USA for street or drag performance use
• Affordable method to accommodate larger rear rubber on G-Bodies
• Reduces frame modifications compared to full frame swap
• Kit includes symmetrical plates for both driver and passenger sides

Specifications

• Material: 3/16- steel plate (laser cut, bare finish)
• Clearance Gain: up to 5/8- on rear upper frame rail
• Fitment: direct for 78-87 GM G-Body platforms (Buick, Chevy, Olds, Pontiac)
• Installation: welding required using standard MIG setup
• Kit Weight: approx.-19-lb
• Warranty: BMR limited coverage applies to manufacturing defects only

Included Components

• 2- Frame-rail modification plates for rear upper rails (bare)
• 2- End-plates (driver and passenger side)

Product Description

The BMR Suspension FR461 Rear Frame Notch Kit is engineered to increase rear tire clearance on 1978-1987 GM G-Body vehicles - including Buick Grand National and Regal, Chevrolet Monte Carlo/El Camino/Malibu, Oldsmobile Cutlass, and Pontiac Grand Prix. This kit provides up to 5/8- additional space at the frame's upper rail to accept wider tires commonly used in drag or street applications.

Supplied in bare, laser-cut 3/16- steel plates, the FR461 is intended for skilled installation - requiring the removal of outer frame material and welding of supplied plates. The kit is symmetrical, includes end caps, and is designed to tuck a 275/60R15 radial neatly without chassis surgery.

Ideal for enthusiasts wanting a factory look with modern tire clearance on classic G-Body models, this BMR solution offers precision design, fabrication-grade materials, and installation flexibility for performance builds. Rated best for experienced welders/fabricators and intended for non-emissions-critical vehicles.