QA1 HK02-FM01 Level 2 Full Vehicle Handling Kit, 64-66 Mustang

Bring modern performance and precision to your classic Mustang with QA1’s Level 2 Full Vehicle Handling Kit. Designed for 1964–1966 Mustangs, this system takes everything from the Level 1 package and adds QA1’s triangulate rear 4 link coilover conversion as well as double adjustable coilovers for independent tuning of compression and rebound — delivering the next level of control, comfort, and confidence whether you’re carving corners or cruising.

ENGINEERED FOR MODERN HANDLING

Factory suspension geometry simply can’t keep up with modern expectations. QA1’s Level 2 system replaces outdated leaf springs and stamped arms with performance-tuned components that improve cornering, traction, and stability. The included triangulated 4-link rear system eliminates wheel hop and improves rear-end control under acceleration and braking  all while providing a smoother, more predictable ride.

HANDLING YOU CAN DIAL IN

Double adjustable coilovers allow independent control over compression and rebound, so you can fine-tune ride quality and performance for your exact driving style - whether that’s highway cruising or weekend corner carving.

BUILT FOR EASY INSTALLATION

The front suspension is a direct bolt-in upgrade, retaining the factory shock towers for a clean fit. The rear 4-link system requires welding, but QA1’s self-fixturing brackets simplify alignment and ensure precise geometry. Every part is designed for builders and DIY enthusiasts alike — with everything included to overhaul your car’s stance, ride, and handling.

FEATURES & BENEFITS

Application-specific fit for 1964–1966 Ford Mustangs

Complete front and rear suspension upgrade in one package

Double adjustable QA1 Pro Coil shocks for independent compression and rebound control

Tubular upper and lower control arms for improved strength and geometry

Triangulated 4-link rear system replaces leaf springs for superior traction and comfort

Self-fixturing weld-in rear brackets for easier installation

Adjustable front ride height: stock to –2”

Adjustable rear ride height: stock to –3”

Front and rear sway bars reduce body roll and improves cornering response

All hardware and brackets included

Durable powder-coated components

Specifications

• Performance Level: Level 2
• Includes Shocks: Yes
• Front Spring Rate: 350lb/in.
• Rear Spring Rate: 130lb/in.
• Shock Valving: Double Adjustable