HK53-GMF2RN Level 3 Handling Kit with Narrowed 9in. Housing, 75-81 GM F Body

QA1’s Handling Kit is a complete suspension solution for '75-'81 Camaro/Firebird (GM F-body) owners aiming to achieve the absolute best in handling performance. This kit replaces front and rear suspension, featuring QA1 MOD series 4-way adjustable coilovers and a 4-link setup optimized for wider wheels and tires, along with a custom QA1 9" rear housing for peak performance.

SIGNIFICANT HANDLING IMPROVEMENTS

QA1’s lightweight tubular control arms equipped with low-friction ball joints and composite bushings minimize flex and improve front end geometry for superior handling and response.  The adjustable four link design eliminates wheel hop, improves traction and offers predictable, tunable handling.  Front and rear sway bars along with subframe connectors tie the chassis together to keep the car planted in the most aggressive of corners.

AGGRESSIVE STANCE

Factory springs limit stance, but QA1’s MOD series coilovers and tubular 4-link provide up to 2 inches of front adjustability and 1.25 inches in the rear, allowing for ideal ride height. The four-link kit and included, narrowed, housing allows the ability to use massive 12-inch-wide wheels and 335mm tires.

Note: Achieving maximum wheel and tire width will require mini tubs. 

PERFORMANCE 9" REAR HOUSING

Strength & Durability

• Fabricated center section for added strength
• Trailing arm brackets minimize flex under load

• Heavy-duty 3" axle tubes and 31-spline axles support up to 650HP; housing rated for 800HP

Finish & Maintenance:

• Durable powder coat for a sleek, long-lasting finish
• Includes drain plug, fill plug, and jack pad for easy maintenance
• High-quality T-bolts, studs, and roller bearings included for easy assembly

Specifications:

• 56-1/8” narrowed wheel mounting surface width. Narrowed 2-1/2” per side for use with mini tubs for wider wheel and tires

• Equipped with Big Ford “New Style Torino Axle Flanges” with 2.5” axle offset
• Bolt pattern: 5x4-3/4” for easy wheel compatibility
• Wheel studs: ½” x 3” for alloy wheels

• Requires third member for Ford 9” housings with 31 spline axles

EASY INSTALLATION

The QA1 Handling Kit offers a very straightforward install procedure that even a novice can handle.  The rear crossmember requires minimal, but easy MIG welding.  Once in place, the rear end housing and entire front suspension are a direct bolt-in.

MADE IN THE USA

These products are proudly made in the USA, ensuring high quality and durability.

FEATURES & BENEFITS

• Complete Suspension Kit: Upgraded performance for street and track.
• QA1 MOD Shocks: Fine-tune your ride height and handling for a perfect stance and performance in any driving scenario.
• Custom 9" Rear Housing: Supports up to 800HP.
• Lightweight Front Suspension: Enhances control and reduces flex.
• Easy Installation: Bolt-on with minimal welding required.

FITMENT NOTES

• Narrowed housing recommended to be used with custom offset wheels and mini tubs
• Wheel and tire fitment should be verified on the vehicle
• Mini tubs required for maximum tire width
• Some welding required
• Exhaust modifications may be necessary