QA1 HK02-FM02RS Level 2 Full Vehicle Handling Kit with QA1 9 in. housing, 67-70 Mustang

QA1

SKU
HK02-FM02RS
$8,369.95
Estimated Shipping Date: Jun 24, 2026
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Upgrade your classic Mustang’s ride, handling, and stance with QA1’s Level 2 Full Vehicle Handling Kit. Engineered specifically for 1967–1970 Mustangs, this all-in-one system replaces factory suspension with modern coilovers, tubular control arms, a rear 4-link, and a QA1 9” housing — everything you need to transform your car into a refined, street-ready performer.

MODERN HANDLING FOR CLASSIC MUSCLE

Factory suspension setups simply can’t keep up with today’s power or driving expectations. QA1’s modern geometry and tunable coilovers deliver flatter cornering, better traction, and a smoother ride. The included 9” housing integrates directly with QA1’s triangulated 4-link, creating a rigid, unified rear suspension that’s built to handle power while keeping your Mustang comfortable and composed.

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 STRONG FOR BIGGER CARS

The 1967–1970 Mustangs are larger and heavier than their predecessors, so this kit includes 400 lb/in front springs for ideal balance and support. Combined with QA1’s tubular arms and 4-link rear, you get improved weight transfer, reduced body roll, and a more planted feel through corners.

FEATURES & BENEFITS

  • Application-specific fit for 1967–1970 Ford Mustangs
  • Complete front-to-rear handling package in one kit
  • Double adjustable QA1 Pro Coil shocks allow independent compression and rebound tuning
  • 400 lb/in front springs tuned for the heavier chassis
  • Tubular upper and lower control arms improve geometry and steering response
  • Front and rear sway bars reduce body roll and improves cornering response
  • Rear triangulated 4-link eliminates wheel hop and improves traction
  • Includes QA1 fabricated 9” rear housing with 31-spline 1541H alloy axles rated to 650 HP
  • Heavy-duty 3” OD, ¼” wall axle tubes handle up to 800 HP
  • Big Ford “New Style Torino” flanges for brake compatibility
  • Adjustable front ride height: stock to –2”
  • Adjustable rear ride height: stock to –3”
  • 5” bolt pattern compatible with most wheels
  • Black powder-coat finish for durability and a clean appearance

EASY INSTALLATION & SERVICEABILITY

QA1’s front suspension bolts directly to factory mounting points, while the rear 4-link includes self-fixturing weld-in brackets that ensure perfect geometry and alignment. The QA1 9” housing arrives ready to install, complete with drain and fill plugs, vent port, and jack pad for simple servicing down the road.

FITMENT NOTES

  • Fits 1967–1970 Ford Mustangs
  • Adjustable front ride height: stock to –2”
  • Adjustable rear ride height: stock to –3”
  • Includes 9” housing, 31-spline axles, and hardware
  • Requires welding for 4-link bracket installation
  • Third member sold separately
  • Designed for use with QA1 4-link systems only

Specifications

  • Performance LevelLevel 2
  • Includes ShocksYes
  • Front Spring Rate400lb/in.
  • Rear Spring Rate150lb/in.
  • Shock ValvingDouble Adjustable
  • Axle Shaft Splines31
  • Width (Wheel mounting surfaces)59 3/8in
  • Brake FlangeBig Ford "New Style Torino"
  • Brake Offset2.5"
  • Bolt Pattern5x4.5 in
  • Full Vehicle Kit TypeHandling Kit

FREQUENTLY ASKED QUESTIONS (FAQ’s)

What’s included in the QA1 Level 2 Handling Kit for 1967–1970 Mustangs?

The kit includes QA1 double adjustable front and rear coilovers, tubular front control arms, front and rear sway bars, a rear triangulated 4-link, and a QA1 9” housing with axles and hardware — everything you need for a complete suspension overhaul.

Why are the front springs 400 lb/in?

The 1967–1970 Mustangs are heavier than early models, so the 400 lb/in springs are tuned to maintain ideal ride height, balance, and handling characteristics without feeling harsh.

Can I adjust ride height with this system?

Yes. The coilovers provide ride height adjustability from factory height down to approximately 2 inches lower in the front and stock to 3 inches lower in the rear, letting you fine-tune your stance without affecting geometry.

How much horsepower can this kit handle?

The 31-spline axles are rated for up to 650 HP, while the 9” housing can handle up to 800 HP.

Is this a bolt-in or weld-in kit?

The front suspension is bolt-in, while the rear 4-link uses self-fixturing weld-in brackets for added strength and accuracy.

What’s the difference between QA1 Level 1 and Level 2 kits?

Level 1 features single adjustable shocks, while Level 2 adds double adjustable shocks and includes QA1’s triangulated rear 4 link coilover conversion and rear sway bar.