UMI Performance Adjustable Extended Length Lower Rear Control Arms - Rod Ends - Black (1978-1996 GM B-Body) (3614-B)
Eliminate suspension bind, correct rear axle alignment, and center the rear wheels perfectly in the wheel openings of your vehicle with the UMI Performance Adjustable Extended Length Lower Rear Control Arms with Spherical Rod Ends (3614-B). Specially designed for 1978-1996 GM B-Body platforms—including the Chevrolet Impala SS, Caprice, Buick Roadmaster, and LeSabre—these heavy-duty tubular control arms feature a +5/8" extended baseline length to fix the factory aesthetic mis-centering common on B-Body vehicles.
Constructed from 1.500" OD x 0.120" wall thickness DOM steel tubing and 100% TIG-welded for maximum structural strength, these hybrid control arms combine a chassis-side greaseable polyurethane bushing with an axle-side Teflon-lined 4140 chromoly spherical rod end. This combination allows full bind-free suspension articulation during hard cornering and launches while isolating unwanted noise, vibration, and harshness (NVH). Double-adjustable threaded adjusters permit an extra 1/4" of fine-tune adjustment beyond the baseline 5/8" extension. Integrated sway bar mounting holes are reinforced with TIG-welded 0.120" steel sleeves and include CNC-machined billet aluminum mounting spacers to accept factory or aftermarket sway bars. Arrives finished in a durable gloss black powder coat with Grade 10.9 sway bar mounting hardware included.
Features
- 5/8" extended baseline length centers rear wheels within the fender arches on Impala SS and Caprice models
- Double-adjustable design permits an additional 1/4" of fine-tune length adjustment for precise thrust angle alignment
- Axle-side 4140 chromoly Teflon-lined spherical rod ends eliminate suspension bind for maximum articulation
- Chassis-side greaseable polyurethane bushings absorb road noise and vibration
- Built from heavy-duty 1.500" OD x 0.120" wall thickness DOM steel tubing with 100% TIG-welded construction
- Reinforced sway bar mounting holes featuring TIG-welded 0.120" steel internal sleeves
- Includes CNC billet aluminum sway bar spacers for mounting factory or aftermarket rear sway bars
- Compatible with UMI weld-in lower control arm relocation brackets (P/N 3610)
- Includes Grade 10.9 replacement sway bar mounting hardware
- Durable gloss black powder coat finish protects against rust and corrosion
Specifications
- SKU: 3614-B
- Manufacturer: UMI Performance
- Country of Origin: USA
- Material: 1.500" OD x 0.120" Wall DOM Steel Tubing
- Rod Ends: 4140 Chromoly Teflon-Lined Spherical Bearing Rod Ends
- Chassis Bushings: Greaseable Polyurethane
- Baseline Extension: +5/8" over factory length
- Additional Adjustment: +1/4" extended adjustment range
- Finish: Gloss Black Powder Coat
- Product Weight: 16.0 lbs
- Dimensions: 26" x 6" x 6"
- Unit of Measure: Pair (Driver & Passenger Side)
- Sway Bar Hardware: Included (Grade 10.9)
- Frame Hardware: Uses OEM Bolts (or optional aftermarket kit)
Fitment Notes
- Position: Rear Lower Control Arms (Pair).
- Fits 1978-1996 GM B-Body platforms (Chevrolet Impala SS, Caprice, Buick Roadmaster, LeSabre, Pontiac Bonneville, Catalina).
- Driveshaft Note: Depending on ride height and axle positioning, extended control arms may require a custom longer driveshaft to ensure proper slip-yoke engagement.
- Relocation Bracket Compatibility: Fully compatible with UMI weld-in relocation brackets (P/N 3610) by rotating the included billet sway bar spacer block.
- Direct bolt-in installation using basic shop hand tools (estimated 1-2 hours install time).
Fitment
1991 Buick Roadmaster
1992 Buick Roadmaster
1993 Buick Roadmaster
1994 Buick Roadmaster
1995 Buick Roadmaster
1996 Buick Roadmaster
1978 Buick LeSabre
1979 Buick LeSabre
1980 Buick LeSabre
1981 Buick LeSabre
1982 Buick LeSabre
1983 Buick LeSabre
1984 Buick LeSabre
1985 Buick LeSabre
1978 Chevrolet Caprice
1979 Chevrolet Caprice
1980 Chevrolet Caprice
1981 Chevrolet Caprice
1982 Chevrolet Caprice
1983 Chevrolet Caprice
1984 Chevrolet Caprice
1985 Chevrolet Caprice
1986 Chevrolet Caprice
1987 Chevrolet Caprice
1988 Chevrolet Caprice
1989 Chevrolet Caprice
1990 Chevrolet Caprice
1991 Chevrolet Caprice
1992 Chevrolet Caprice
1993 Chevrolet Caprice
1994 Chevrolet Caprice
1995 Chevrolet Caprice
1996 Chevrolet Caprice
1994 Chevrolet Impala SS
1995 Chevrolet Impala SS
1996 Chevrolet Impala SS
1977 Pontiac Bonneville
1978 Pontiac Bonneville
1979 Pontiac Bonneville
1980 Pontiac Bonneville
1981 Pontiac Bonneville
1977 Pontiac Catalina
1978 Pontiac Catalina
1979 Pontiac Catalina
1980 Pontiac Catalina
1981 Pontiac Catalina
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