Availability
QA1 Four Link Conversion and Standard Ford 9 in. Axle Kits
Not Yet Reviewed
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
Showing In Stock Items. Show All 3 Items.
REAR SUSPENSION, 67-69 GM F-BODY, 67-69 GM F-BODY, D-ADJ, 12-170, AXLE-STD
Part Number: QA1-R256-170S
Not Yet Reviewed
Estimated Ship Date: Feb 12, 2026 if ordered today
Estimated Ship Date: Feb 12, 2026 if ordered today
REAR SUSPENSION, 68-72 GM X-BODY, 68-72 GM X-BODY, D-ADJ, 12-170, AXLE-STD
Part Number: QA1-R258-170S
Not Yet Reviewed
Estimated Ship Date: Feb 13, 2026 if ordered today
Estimated Ship Date: Feb 13, 2026 if ordered today
Rear Suspension, 4 Link Conversion, Triangulated, Double Adjustable, 170 lbs/in, Springs, Black, Ford 9 in, Standard Axle, Chevrolet, Pontiac, Kit
Part Number: QA1-R257-170S
Not Yet Reviewed
Estimated Ship Date: Feb 12, 2026 if ordered today
Estimated Ship Date: Feb 12, 2026 if ordered today
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