To order

Step 1
Choose one of the options listed for the MM Caster Camber Plate main plate finish.

Step 2
Choose one of these three options for the Rear Lower Control Arms.

• Extreme-Duty Adjustable Control Arms are rated at 600 lb-ft of rear wheel torque. Allows installation of a stock-style swaybar.
• Drag-Race Adjustable Control Arms are rated at 1,000 lb-ft of engine torque. These do not have mounts for a stock-style swaybar.
• None, I already have them.

Step 3
Choose one of these options for the MM Adjustable Rear Swaybar (anti-roll bar):

• Smaller (lower rate) swaybars provide better street manners with less tendency to oversteer.
• Larger (higher rate) swaybars provide less body roll and better traction when launching, but also a greater tendency to oversteer during cornering, especially when used with wide front tires.

Step 4
Choose the type of chassis mounting for the MM Adjustable Rear Swaybar:

• Weld-in weighs less, looks cleaner, and has a shorter installation time, but requires a MIG or TIG welder.
• Bolt-on needs no welding, but weighs slightly more and takes longer to install.

Step 5
Choose one of the two front spring rates. These springs are from Hyperco's UHT line of springs that is barrel shaped for maximum clearance to the strut. The UHT springs only fit Mustangs with Fox-length front control arms, not the longer SN95 arms.

• 150 lb/in is very strip oriented. It provides increased weight transfer and traction than stiffer springs.
• 200 lb/in is more street/strip oriented. It allows less body roll when cornering for better street manners, but the trade-off is a slight loss in traction at launch. By comparison, the typical spring rate of a Mustang set up for mild street performance handling is 300 lb/in.

Step 6
Choose the finish of the aluminum Panhard rod.

• Standard aluminum finish is as the aluminum comes from the mill
• Polished aluminum: we polish the aluminum rod while it is spinning in a lathe.

Step 7
Click the Add To Cart button.

Recommendations

• For better street manners, retain the typical Fox Mustang 1-5/16" front swaybar. Either retain the stock rear swaybar or use the softer MM adjustable rear swaybar.
• For best strip performance, upgrade to the MM adjustable 1-1/4" rear anti-roll bar. You may want to disconnect it for street driving, depending on the car's tire setup.
• For the best strip performance with any swaybar setup, disconnect one front swaybar endlink.

• Excellent launching ability
• Retains good street manners.
• Provides very good ride quality.
• Adjustable ride height lets you change your Mustang's instant center location to tune the anti-squat percentage for optimum traction.
• Does not cause the suspension binding typical with common control arm upgrades using urethane bushings or solid pivot-only bushings.
• The torque-arm eliminates wheel hop, so the quad shocks and upper control arms are removed, saving weight.
• Improves rear suspension stability and consistency.
• Easy ride height adjustment at front and rear.
• Easy adjustment of the dampers to improve weight transfer at the strip, and then back to street settings.

Includes these standard items:
Items different from the MM Street & Strip Box are italicized.

• MM Caster/Camber Plates
• MM Full-Length Subframe Connectors
• MM Extreme-Duty Adj. Rear Lower Control Arms or
• MM Drag Race Adj. Rear Lower Control Arms
• Tokico D-Spec Struts
• Tokico D-Spec Shocks
• H&R Sport Springs, rear pair
• Urethane rear spring isolators
• MM Panhard Bar
• MM Heavy Duty Torque-arm
• MM Adjustable Rear Swaybar
• MM Roll Bar, 6-point, swing-out door bars
• MM Front Coil-over Kit
• Hypercoil 150 or 200 lb/in front springs, 2-1/2"
• Spanner wrench

Other spring rates are available.
Contact an MM Tech Associate to customize this Grip Box.

Fits

• 1983-1989 Mustang convertible with V8 (requires 8.8" rear axle and V8 spindles).
• 1983-1986 Mustang convertible fitted with 8.8" rear axle and 1987-93 V8 or SN95 spindles.