Heavy-Duty Rear Lower Control Arms with adjustable-height spring perch and spherical bearings. Fits 1983-1988 Thunderbird with Mustang rear springs.
Improves traction and handling by reducing the unwanted deflection allowed by the stock soft rubber bushings and flexible stamped steel control arm.
Unique MM 3-piece bushing and spherical bearing design easily allows the articulation required for proper handling, and reduces the deflection that can cause wheel hop.
Use with Mustang springs!
The adjustable-height feature of these control arms was designed for aftermarket springs intended for 1979-2004 solid-axle equipped Mustangs.
Why use Mustang springs?
Aftermarket lowering and performance springs are no longer made for 1983-1988 Thunderbirds. These MM control arms allow readily available aftermarket Mustang rear springs to be fitted to your Thunderbird. That gives you several choices of springs, as you can use any rear spring listed for a solid-axle equipped 1979-2004 Mustang. Order a pair of Mustang rear springs.
NOT for use with Thunderbird springs
If Thunderbird springs, either stock or aftermarket, are installed with these control arms the rear ride height will be raised, compared to a stock Thunderbird control arm, even when the adjuster is at its lowest setting.
Fits 1983-1988 Thunderbird. Includes adjustable-height spring perch and a swaybar mount for a stock-style rear swaybar.
If your Thunderbird...
Why not use the Heavy-Duty control arms in those situations?
For one reason: Those situations may overload the urethane, leading to premature failure of the bushing. When you hit your Thunderbird's throttle pedal, all of the forces accelerating your car pass from the rear axle housing through the lower control arms and their bushings; that's what moves your Thunderbird forward. The harder the car accelerates on launch, the greater the forces on the lower control arm bushings. Higher forces lead to a shorter lifespan of the bushings.
Better by design
Why do I need MM Rear Lower Control Arms?
Maximum Motorsports Heavy-Duty Adjustable Rear Lower Control Arms for 1983-1988 Thunderbird