QA1 RCK52407 Rear Pro Coil Double Adjustable for 1979-2004 Ford Mustang

Vehicle Fitment

• 1979-2004 Ford Mustang (Fox Body, SN95, New Edge; Rear, RWD; 2.3L I4, 2.8L V6, 3.3L I6, 3.8L V6, 4.2L V8, 5.0L V8, 4.6L V8)

Fitment Notes

• Rear Pro Coil coil-over conversion system for 1979-2004 Ford Mustang solid-rear-axle applications.
• Fits Fox Body, SN95, and New Edge Mustang generations within the specified years.
• Does not fit 1999-2004 Mustang Cobra models equipped with the independent rear suspension (IRS).
• All listed applications are rear-wheel drive (RWD).
• Includes a 175 lb/in spring rate intended for performance-handling applications.
• Fully threaded aluminum shock bodies provide up to 2 inches of lowering from stock.
• Direct bolt-in installation does not require welding.
• Rear coil-over conversion replaces the factory rear spring and shock arrangement with a combined coil-over assembly.
• Sold as a pair for the rear suspension.
• 1999-2004 Cobra IRS applications are specifically excluded.
• 2005 and newer Ford Mustang applications are excluded.

Features

• Complete rear Pro Coil coil-over conversion system for 1979-2004 Ford Mustang.
• Double-adjustable shocks provide independent compression and rebound damping control.
• 324 total valving combinations provide extensive suspension tuning capability.
• 175 lb/in coil-over springs are included for performance-handling applications.
• Fully threaded aluminum shock bodies allow up to 2 inches of lowering from stock.
• Twin-tube shock construction provides consistent damping performance.
• Aluminum shock bodies reduce weight compared with conventional steel-bodied dampers.
• Polyurethane eyelet bushings provide controlled mounting movement and durability.
• Ride height can be adjusted independently through the threaded coil-over bodies.
• Designed as a bolt-in conversion without welding.
• Includes the required installation hardware.
• Double-adjustable damping allows tuning for street and track use.
• Suitable for performance-oriented handling and stance applications.
• QA1 shocks are manufactured and tested in the USA.

Specifications

• Brand: QA1
• Part Number: RCK52407
• Product Line: Pro Coil
• Product Type: Rear Coil-Over Conversion System
• Position: Rear
• Application: Ford Mustang
• Year Range: 1979-2004
• Drivetrain: RWD
• Shock Valving: Double Adjustable
• Valving Selections: 324
• Shock Construction: Twin-tube
• Shock Body Material: Aluminum
• Upper Mount: Bushed eyelet
• Lower Mount: Bushed eyelet
• Spring Rate: 175 lb/in.
• Spring Included: Yes
• Compressed Length: 11.63 in.
• Extended Length: 16.88 in.
• Ride-Height Adjustment: 0-2 in. lowered from stock
• Bushing Material: Polyurethane
• Shock Finish: Silver
• Spring Finish: Black
• Gas Charged: No
• Welding Required: No
• Quantity: 2x rear coil-over assemblies

Included Components

• 2x Double-adjustable rear coil-over shocks
• 2x 175 lb/in. coil-over springs
• 1x Installation hardware set

Product Description

QA1 RCK52407 is a rear Pro Coil double-adjustable coil-over conversion system designed for 1979-2004 Ford Mustang models with the conventional solid rear axle. The system combines adjustable aluminum shocks with 175 lb/in. coil-over springs to provide improved suspension control, ride-height adjustment, and handling performance across Fox Body, SN95, and New Edge Mustang builds.

The double-adjustable shocks provide independent compression and rebound tuning with 324 total valving combinations, allowing the suspension to be tailored for street driving, spirited handling, or track use. The fully threaded aluminum shock bodies provide up to 2 inches of lowering from stock, while the polyurethane eyelet bushings provide controlled suspension movement at the mounting points. The twin-tube shock design delivers consistent damping characteristics.

RCK52407 is designed as a bolt-in rear conversion and does not require welding. The kit includes two rear coil-over shocks, two 175 lb/in. springs, and installation hardware. It is compatible with 1979-2004 rear-wheel-drive Mustangs but specifically excludes 1999-2004 Cobra models equipped with independent rear suspension. Verify that the vehicle uses the compatible solid rear axle before installation.