UMI Performance Adjustable Rear Upper Control Arms - Rod Ends - Red (1978-1996 GM B-Body) (3617-R)
Fine-tune rear axle pinion angle, eliminate suspension binding, and maximize launch traction with the UMI Performance "On-Car" Double Adjustable Rear Upper Control Arms with QA1 Spherical Rod Ends (3617-R). Engineered specifically for 1978-1996 GM B-Body platforms—including the Chevrolet Impala SS, Caprice, Buick Roadmaster, and LeSabre—these high-performance upper control arms are designed to replace factory stamped steel arms to handle high-horsepower street, drag racing, and autocross applications.
Constructed using 100% TIG-welded aircraft-quality 4140 chromoly steel and 0.250" CNC-machined steel mounting brackets, these control arms feature UMI’s high-strength 1.000" solid 4140 chromoly on-car adjusters. This double-threaded turnbuckle design allows quick and precise pinion angle adjustments on the vehicle simply by loosening two jam nuts. Outfitted with heat-treated, hard chrome-plated QA1 spherical rod ends featuring self-lubricating Teflon/Kevlar races, these arms allow full, bind-free suspension articulation while completely eliminating deflection. Finished in a durable bright red powder coat for superior protection and eye-catching underbody style.
Features
- On-car double-adjustable design allows precise rear pinion angle tuning without unbolting the arm
- Eliminates suspension bind for smooth chassis rotation and maximum rear end articulation
- Constructed from aircraft-quality 4140 chromoly steel with heavy-duty 0.250" CNC-machined mounting brackets
- 100% TIG-welded construction for maximum structural integrity and high-torque durability
- 1.000" solid 4140 chromoly double-threaded turnbuckle adjusters with CNC-machined 4140 tube adapters
- Equipped with premium QA1 heat-treated, hard chrome-plated alloy steel spherical rod ends
- Self-lubricating Teflon/Kevlar rod end races prevent metal-to-metal contact and eliminate noise
- Dramatically reduces 60-foot times, wheel hop, and traction loss at the track
- Durable bright red powder coat finish for superior corrosion resistance and bold underbody styling
- 100% designed, tested, and manufactured in the USA
Specifications
- SKU: 3617-R
- Manufacturer: UMI Performance
- Country of Origin: USA
- Tubing & Adjuster Material: Aircraft-Quality 4140 Chromoly Steel
- Mounting Brackets: 0.250" CNC-Machined Mild Steel
- Rod Ends: Premium QA1 Spherical Rod Ends (Teflon/Kevlar Lined)
- Adjustability: On-Car Double Adjustable (1.000" Solid Chromoly Adjuster)
- Finish: Bright Red Powder Coat
- Weight: N/A
- Dimensions: N/A
- Unit of Measure: Pair (Driver & Passenger Side)
- Hardware: Reuses OEM Frame Hardware (or optional aftermarket kit)
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).
- Direct bolt-in upgrade; reuses factory frame hardware or upgraded Grade 10.9 bolts.
- Crucial upgrade for setting proper driveline pinion angle after lowering or installing aftermarket rear axle assemblies.
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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