BMR CAB400H Rear Lower Control Arm Relocation Brackets Black 1964-1972 GM A-Body

Vehicle Fitment

• 1964-1972 Chevrolet Chevelle (All Trims, All engines, RWD)
• 1964-1972 Chevrolet El Camino (All Trims, All engines, RWD)
• 1964-1967 Chevrolet Malibu (All Trims, All engines, RWD)
• 1970-1972 Chevrolet Monte Carlo (All Trims, All engines, RWD)
• 1964-1972 Pontiac GTO (All Trims, All engines, RWD)
• 1964-1972 Pontiac LeMans (All Trims, All engines, RWD)
• 1964-1970 Pontiac Tempest (All Trims, All engines, RWD)
• 1969-1972 Pontiac Grand Prix (All Trims, All engines, RWD)
• 1964-1972 Oldsmobile Cutlass (All Trims, All engines, RWD)
• 1964-1971 Oldsmobile 442 (All Trims, All engines, RWD)
• 1964-1972 Oldsmobile F85 (All Trims, All engines, RWD)
• 1964-1972 Oldsmobile Vista Cruiser (All Trims, All engines, RWD)
• 1964-1972 Buick Skylark (All Trims, All engines, RWD)
• 1964-1969 Buick Special (All Trims, All engines, RWD)
• 1965-1967 Buick Gran Sport / 1968-1972 Buick GS / GS 350 / GS 400 / GS 455 (All engines, RWD)
• 1964-1972 Buick Sportwagon (All Trims, All engines, RWD)
• 1971-1972 GMC Sprint (All engines, RWD)

Fitment Notes

• Fits all 1964-1972 GM A-Body vehicles sharing the standard rear lower control arm mounting geometry - covers all Chevrolet, Pontiac, Oldsmobile, Buick, and GMC A-Body models listed above
• Bolt-on installation using existing factory mounting points - no welding required for most applications; welding is recommended in addition to bolt-on for extreme high-power or race-only builds
• Designed for use with factory 10-bolt and 12-bolt rear end housings; fitment with non-factory or custom-fabricated rear ends should be verified before ordering
• Lowering the control arm mount position may reduce ground clearance for sway bars mounted on the control arms; verify clearance if a factory-style control arm-mounted sway bar is in use
• Provides three mounting locations per side - allowing the builder to select the optimal instant center position for their specific application (street, drag, handling)
• Position: Rear lower control arm frame mount (left and right)
• Estimated installation time: 2-3 hours; a drill with a sharp 1/2-inch bit is required to open one new mounting hole per side
• A rear wheel alignment is recommended after installation

Features

• Corrects the rear suspension geometry of 1964-1972 GM A-Body vehicles to improve anti-squat characteristics - relocating the rear lower control arm mount to a position that better manages weight transfer under acceleration for improved traction
• Adjusts the suspension instant center by changing the lower control arm's effective angle relative to the chassis - a key variable in both drag strip launch performance and corner-exit traction
• Three mounting locations per side allow the builder to optimize the instant center for their specific application: a lower position increases anti-squat for drag racing, while other positions can be tuned for road course or street handling characteristics
• Three-point bolt-on mounting design prevents counter-rotation of the bracket under load - eliminating the bracket movement that single or dual-bolt designs can experience under the high torque inputs of performance driving
• Manufactured from 3/16-inch laser-cut, CNC-formed hardened plate steel - providing the rigidity and strength required to withstand sustained high-power rear suspension loads without deformation or cracking
• 100% bolt-on installation using existing factory frame mounting points - no chassis welding required for street and mild performance applications, making this a genuinely accessible upgrade without fabrication skills
• Black hammertone powdercoat provides a durable, attractive finish that resists chipping, corrosion, and the moisture and road debris exposure typical of under-car components
• Designed for street performance, drag racing, and handling/road course applications
• Proudly designed and manufactured in the USA by BMR Suspension

Specifications

• Part Number: CAB400H
• Finish: Black hammertone powdercoat
• Material: 3/16-inch laser-cut, CNC-formed hardened plate steel
• Mounting Locations: 3 per side
• Installation Type: Bolt-on (no welding required for most applications)
• Position: Rear lower control arm frame mount (left and right)
• Estimated Install Time: 2-3 hours
• Tools Required: Wrenches, sockets, hydraulic jack, jack stands, drill with sharp 1/2-inch bit
• Country of Origin: USA (designed and manufactured)
• Warranty: 2 years (BMR standard)

Included Components

• 2x BMR CAB400H Rear Lower Control Arm Relocation Brackets (left and right, black hammertone)
• Hardware kit (Grade 8 bolts and associated fasteners)

Product Description

The BMR Suspension CAB400H is a rear lower control arm relocation bracket set engineered specifically for 1964-1972 GM A-Body vehicles - covering the full range of Chevrolet, Pontiac, Oldsmobile, Buick, and GMC models built on the A-Body platform during those years. The factory rear lower control arm mount geometry on these vehicles was designed for balanced everyday driving rather than optimized performance, and as a result the rear suspension's anti-squat and instant center characteristics are not ideal for hard acceleration launches or high-traction corner exits. Under load, this produces greater-than-necessary chassis squat under acceleration, reducing forward energy transfer and producing weaker drag strip hole-shots - a well-known limitation of the factory A-Body rear suspension that has driven decades of aftermarket development. The CAB400H addresses this directly by relocating the lower control arm's chassis attachment point to a new position that improves the suspension's anti-squat behavior, changes the instant center, and optimizes the geometry for power transfer to the rear tires.

The brackets are manufactured from 3/16-inch laser-cut, CNC-formed hardened plate steel and offer three mounting locations per side, allowing the builder to select the instant center position that best suits their specific application - whether that's maximizing drag strip launch, improving corner-exit traction on a road course, or finding a balance for an aggressive street car. The three-point bolt-on mounting design prevents bracket counter-rotation under the high torque inputs of performance driving without requiring chassis welding, making this a genuinely accessible upgrade for builders who do not have access to a welder. For extreme high-power builds, BMR recommends supplementing the bolt-on installation with welding for additional security. The CAB400H is finished in black hammertone powdercoat and is made in the USA by BMR Suspension. A 1/2-inch drill bit is required to open one new mounting hole per side during installation.