UMI Performance Adjustable Extended Length Upper Control Arms - Roto-Joints - Black (1978-1996 GM B-Body) (3624-B)
Properly center your rear wheels, eliminate suspension binding, and fine-tune pinion angle with the UMI Performance "On-Car" Double Adjustable Extended Length Rear Upper Control Arms featuring Roto-Joints (3624-B). Specially designed for 1978-1996 GM B-Body platforms—including the Chevrolet Impala SS, Caprice, Buick Roadmaster, and LeSabre—these heavy-duty upper control arms feature an extended baseline length specifically engineered to pair with extended lower control arms to correct factory wheel arch mis-centering.
Constructed with 0.250" CNC-machined mild steel mounting brackets, 4140 chromoly threaded tube adapters, and a heat-treated chromoly turnbuckle adjuster, these control arms allow quick on-car pinion angle and length adjustments simply by turning the adjuster while remaining installed on the vehicle. Equipped with UMI's rebuildable spherical Roto-Joints, they offer 28 degrees of unrestricted movement to eliminate binding during hard cornering and drag launches. The internal Delrin races damp road vibration and shock for quiet, comfortable street driving. Finished in a durable gloss black powder coat and shipped fully assembled.
Features
- Extended baseline length design properly centers rear axle assembly within the fender openings
- Designed specifically to pair with extended length lower rear control arms (P/N 3612, 3614, 3621, or 3622)
- On-car double-adjustable design uses a heat-treated chromoly adjuster for effortless pinion angle tuning
- Features UMI spherical Roto-Joints with 28 degrees of total rotation for bind-free suspension articulation
- Self-lubricating Delrin races in Roto-Joints absorb road noise and shock for smooth street comfort
- Heavy-duty 0.250" CNC-machined mild steel mounting plates and 4140 chromoly threaded tube adapters
- Fully rebuildable and greaseable joint design for long-lasting performance
- Durable gloss black powder coat finish protects against corrosion and rust
- 100% designed, tested, and manufactured in the USA
Specifications
- SKU: 3624-B
- Manufacturer: UMI Performance
- Country of Origin: USA
- Mounting Plate Material: 0.250" CNC-Machined Mild Steel
- Tube Adapters & Adjuster: Heat-Treated 4140 Chromoly Steel
- Bushings/Joints: Rebuildable Spherical Roto-Joints w/ Delrin Races
- Adjustability: On-Car Double Adjustable (Chromoly Adjuster)
- Arm Style: Extended Length Double Adjustable
- Finish: Gloss Black Powder Coat
- Weight: N/A
- Dimensions: N/A
- Unit of Measure: Pair (Driver & Passenger Side)
- Hardware: Uses OEM Frame Bolts
Fitment Notes
- Position: Rear Upper Control Arms (Pair).
- Fits 1978-1996 GM B-Body platforms (Chevrolet Impala SS, Caprice, Buick Roadmaster, LeSabre, Pontiac Bonneville, Catalina).
- Designed specifically for use with extended length lower control arms.
- Driveshaft Note: Depending on ride height and axle positioning, extended control arms may require a custom longer driveshaft to maintain proper slip-yoke engagement.
- Direct bolt-in upgrade; reuses factory frame hardware or upgraded Grade 10.9 bolts.
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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