Description

QA1's 4-link conversion and standard Ford 9 in. axle kits give you everything you need to get your 2nd Gen Camaro or Firebird project on the road—fast. QA1 paired their 4-link suspension kit with a custom 9 in. rear housing for enthusiasts seeking top-tier performance and hassle-free installation. Your time is valuable, so say goodbye to hunting for junkyard rear ends or struggling with endless measurements and mismatched components—every component in this package is tested by QA1 to fit the first time. Each kit is engineered to deliver the performance, ride quality, and adjustability you need to handle serious power and aggressive driving—without the hassle of having to source each part.

Ultimate shock performance:

Ditch your leaf springs for QA1 MOD Series coilovers, triangulated 4-link suspension and an all-new narrowed 9 in. rear end. QA1's MOD shocks are designed to provide the ultimate in tunability and performance. With their four-way adjustable valving, remote nitrogen canisters, and huge dampening forces, QA1 MOD shocks deliver in any driving scenario.

QA1 4-link kits are fully engineered to provide ride height, ride quality and instant center adjustability. Whether you're after a lowered, aggressive look or need clearance for wider wheels and tires, QA1 systems deliver.

Easy installation:

QA1 is committed to delivering products that make upgrading your vehicle as simple as possible, and their 4-link kits with 9 in. housing are designed for a bolt-on installation, eliminating the need for custom fabrication.

Performance housing features:

* Fabricated center section engineered for maximum strength and durability
* Formed trailing arm brackets reduce flex under high loads, ensuring your suspension remains rigid
* Heavy-duty 3 in. OD, 1/4 in. wall axle tubes provide the durability needed for high-performance applications
* 31-spline 1541H alloy axles support up to 650 hp, with the housing handling up to 800 hp
* Durable semi-gloss powder coat finish offers long-lasting protection and a clean, sleek look
* Drain plug, fill plug, and Jack Pad come standard to make service a breeze
* Includes T-bolts and housing studs for assembling axle shafts and installing third members
* High-quality roller bearings for smooth operation and long-lasting reliability

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	qapHK42-GMF2RS	QA1 Level 2 Full Vehicle Handling Suspension Kits for 1970-1974 CAMARO, FIREBIRD - HK42-GMF2RS Packages, Kits, Coilovers, 4-Link with 9 in. Housing, Control Arms, Subframe Connectors, Chevrolet, Pontiac, Kit

Data: v4.2 - Upd: 2026-10-15 16:42:22

Features

Specifications

Product Attributes - Brand

QA1

Product Attributes - Manufacturer's Part Number

R257-170S

Product Attributes - Part Type

Rear Suspension Packages

Product Attributes - Product Line

QA1 Four Link Conversion and Standard Ford 9 in. Axle Kits

Product Attributes - UPC

806990230638

Product Attributes - Third Member Included

No

Product Attributes - Third Member Case Style

Ford 9 inch

Product Attributes - Axle Shafts Included

Yes

Product Attributes - Axle Shaft Spline Quantity

31

Product Attributes - Upper Control Arms Included

No

Product Attributes - Lower Control Arms Included

No

Product Attributes - Air Bags Included

No

Product Attributes - Rear Shocks/Struts Included

Yes

Product Attributes - Rear Shock Type

Double adjustable coilover

Product Attributes - Coilover Springs Included

Yes

Product Attributes - Coilover Spring Rate (lbs/in)

170 lbs./in.

Product Attributes - Spring Finish

Gray/Silver

Product Attributes - Suspension Package Finish

Black powdercoated

Product Attributes - Bushings Included

Yes

Product Attributes - Bushing Material

Spherical bearing

Product Attributes - Bushing Color

Natural

Product Attributes - Sway Bar Included

No

Product Attributes - Watts Link Included

No

Product Attributes - Panhard Bar Included

No

Product Attributes - Adjustable Panhard Bar Included

No

Product Attributes - Upper Trailing Arms Included

Yes

Product Attributes - Adjustable Upper Trailing Arms Included

Yes

Product Attributes - Adjustable Upper Trailing Arms Type

Double adjustable

Product Attributes - Lower Trailing Arms Included

Yes

Product Attributes - Adjustable Lower Trailing Arms Included

Yes

Product Attributes - Adjustable Lower Trailing Arms Type

Single adjustable

Product Attributes - Trailing Arm Mount Braces Included

Yes

Product Attributes - Trailing Arm Hardware Included

Yes

Product Attributes - Rotors Included

No

Product Attributes - Calipers Included

No

Product Attributes - Quantity

Sold as a kit.

Product Attributes - Special Attention

Requires third member for Ford 9 in. housings with 31 spline axles.

Compatibility