J&M Products Rear Weight Jack Adjustable Lower Control Arms (23958) - 1979-1998 Ford Mustang
Unlock precise control over your 1979-1998 Mustang’s suspension with J&M Products' rear weight jack lower control arms. Designed for high-performance street and track solid-axle Mustangs, these arms integrate a built-in spring perch weight jack, allowing you to fine-tune rear weight transfer and ride height with ease. Unlike factory arms that are prone to twisting and deflection under load—making adjustments inconsistent—our tubular construction provides a rock-solid, predictable foundation that ensures your tuning changes translate directly to performance at the track.
Engineered and manufactured in the USA, these weight jack arms feature a street-smart hybrid bushing strategy: a 3-piece Poly-Ball bushing on the chassis side for bind-free articulation during cornering, and a heavy-duty chrome-moly spherical bearing on the axle side to eliminate deflection. Rigorously tested against factory mounting standards, these arms offer superior rigidity and strength. Whether you are dialing in your drag racing launch or optimizing your track handling, these direct bolt-on arms are a premium upgrade for any enthusiast, backed by a lifetime warranty for the original owner.
Features
- Built-in spring perch weight jack for fine-tuning rear weight transfer and ride height
- Street/race hybrid bushing design: 3-piece Poly-Ball on the chassis side and chrome-moly spherical bearing on the axle side
- Eliminates suspension bind for predictable, neutral handling while providing rigid support
- CNC laser-cut and pulse-welded 2-inch round steel tubing construction for maximum strength
- Drastically reduces unwanted deflection compared to factory stamped steel arms
- Direct bolt-on replacement for 1979-1998 Mustang solid-axle applications
- Available in multiple powder coat finish options for excellent corrosion resistance
- Designed, engineered, and manufactured in the USA
- Backed by a lifetime warranty for the original owner
Fitment
- 1979 Ford Mustang (Solid Rear Axle)
- 1980 Ford Mustang (Solid Rear Axle)
- 1981 Ford Mustang (Solid Rear Axle)
- 1982 Ford Mustang (Solid Rear Axle)
- 1983 Ford Mustang (Solid Rear Axle)
- 1984 Ford Mustang (Solid Rear Axle)
- 1985 Ford Mustang (Solid Rear Axle)
- 1986 Ford Mustang (Solid Rear Axle)
- 1987 Ford Mustang (Solid Rear Axle)
- 1988 Ford Mustang (Solid Rear Axle)
- 1989 Ford Mustang (Solid Rear Axle)
- 1990 Ford Mustang (Solid Rear Axle)
- 1991 Ford Mustang (Solid Rear Axle)
- 1992 Ford Mustang (Solid Rear Axle)
- 1993 Ford Mustang (Solid Rear Axle)
- 1994 Ford Mustang (Solid Rear Axle)
- 1995 Ford Mustang (Solid Rear Axle)
- 1996 Ford Mustang (Solid Rear Axle)
- 1997 Ford Mustang (Solid Rear Axle)
- 1998 Ford Mustang (Solid Rear Axle)
Note: Does not fit 1999-2004 Mustang IRS models.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
