-9%
Click to zoom in
Convert Your Classic Mopar from Torsion Bars to Coil-Overs
The QA1 52343-S400 Front Coilover System converts a 1967-1976 Mopar A-Body, including the Dodge Dart, Dodge Demon, and Plymouth Barracuda, from torsion bar suspension to a modern QA1 coil-over setup. The kit bolts in without cutting or welding to the frame, and includes a tubular K-member for reduced weight and big-tube header clearance, modular motor mounts compatible with a wide range of engines including the Gen 3 Hemi, and QA1 tubular control arms paired with rack-and-pinion steering for improved drivability.
Key Features
- The 52343-S400 kit's tubular K-member reduces weight and adds clearance for big-tube headers
- Modular motor mounts support many engine options, including Gen 3 Hemi
- Bolts in without cutting or welding, apart from the steering column universal joint
- QA1 tubular control arms and rack-and-pinion steering improve drivability
- Single-adjustable QA1 coil-overs let you dial in ride quality and height
- 0-2 in. of drop with this configuration
- Optional front sway bar compatibility
- Made in the USA
Fitment
| Year Range | Make | Model | Notes |
|---|---|---|---|
| 1967-1976 | Dodge | Dart | Mopar A-Body front coilover conversion |
| 1967-1976 | Dodge | Demon | Mopar A-Body front coilover conversion |
| 1967-1976 | Plymouth | Barracuda | Mopar A-Body front coilover conversion |
Specifications
| Detail | Value |
|---|---|
| MPN | 52343-S400 |
| UPC | 806990163516 |
| Spring Rate | 400 lb/in. |
| Drop | 0-2 in. |
| Shock Valving | Single Adjustable |
| Spindle Type | Mustang II-style with modified steering arms |
| Warranty | Limited Lifetime Warranty on single-adjustable shocks |
What's Included
- 52343-S400 tubular K-member
- Modular motor mounts
- QA1 tubular control arms
- Rack-and-pinion steering assembly
- Single-adjustable QA1 coil-overs
- Mustang II-style spindles
- All required installation hardware
About QA1
QA1 manufactures American-made performance suspension systems for muscle cars, classic trucks, and race cars, specializing in coil-over conversion kits that modernize classic torsion bar and leaf spring platforms. The 52343-S400 kit reflects QA1's approach of pairing tubular chassis components with adjustable coil-overs to give classic Mopar owners a bolt-in path to modern handling.
FAQ
What is the 52343-S400?It is a QA1 front coilover conversion system for a 1967-1976 Mopar A-Body that replaces the factory torsion bar suspension with a coil-over setup.
Does this kit require cutting or welding?The kit bolts in without cutting or welding, with the exception of the steering column universal joint, which must be welded after the steering shaft is shortened.
Can I use a Gen 3 Hemi with this kit?Yes, the modular motor mounts support a Gen 3 Hemi, though the power steering pump will require a pressure reducer and a power steering cooler.
What spring rate comes with this kit?This kit uses a 400 lb/in. spring rate paired with single-adjustable coil-overs.
Can I use this kit with other QA1 torsion bar products?No, the coil-overs and control arms in this kit cannot be used with other QA1 tubular products designed for torsion bar suspension.
What type of spindles does this kit use?It uses Mustang II-style spindles with modified steering arms, which opens up a wide range of brake options.
Is this kit better suited for street driving or racing?Single-adjustable shocks like this kit uses are recommended for cars used primarily on the street, while double-adjustable coil-overs are better suited to consistent drag racing, autocross, or road racing.
What warranty applies to the shocks in this kit?The single-adjustable shocks in this kit are eligible for a Limited Lifetime Warranty.
Install Instructions
- Remove the factory torsion bars, front K-member, and control arms from the vehicle.
- Install the QA1 tubular K-member using the factory frame mounting locations.
- Install the modular motor mounts appropriate for your engine selection.
- Install the QA1 tubular control arms onto the new K-member.
- Mount the rack-and-pinion steering assembly to the K-member.
- Drill out the pilot holes on the K-member for manual rack mounting, using a step drill where holes overlap.
- Shorten the steering shaft as needed and weld the steering column universal joint to the shaft.
- Install the Mustang II-style spindles and modified steering arms.
- Install the single-adjustable QA1 coil-overs onto the control arms.
- Torque all suspension hardware to the specification provided in the kit instructions.
- Have the vehicle professionally aligned before driving.
QA1
QA1 suspension parts are stocked at Black Ops Auto Works for American muscle cars and classic trucks. Shop coilover kits, shock absorbers, springs, handling kits, four link systems, sway bars, strut kits, rod ends, and suspension hardware for the Mustang, Camaro, Corvette, Challenger, Charger, and GM B-Body, F-Body, and G-Body platforms. Every product is filterable by year, make, model, trim, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 536 QA1 SKUs across coilovers, shocks, springs, and handling kit categories. What This Brand Covers QA1 is a suspension manufacturer known for adjustable coilover systems, shock absorbers, and complete handling kits built for muscle cars, classic trucks, drag cars, and pro touring builds. The lineup covers everything from single component shock replacement to full vehicle handling packages. Brand Focus QA1 concentrates on American muscle car and classic truck platforms, with deep coverage of GM, Ford, and ...
View QA1 Products
Suspension
Suspension parts and complete kits for cars, trucks, SUVs, Jeeps, and off-road builds are stocked at Black Ops Auto Works. Shop coilovers, lowering springs, lift kits, leveling kits, shocks and struts, sway bars, control arms, tie rods, ball joints, bushings, chassis bracing, alignment hardware, air suspension, and complete stage kits from Bilstein, KW, Ohlins, Fox, KING, ICON, BC Racing, Silvers, Eibach, H&R, Swift Springs, Whiteline, Energy Suspension, Moog, SPC Performance, Rough Country, ReadyLIFT, BDS, Skyjacker, Air Lift, Firestone, and Black Ops Auto Works. Start with a matched shock and spring package or a full coilover kit, then layer in sway bars, chassis bracing, and camber adjustment hardware. Every part is filterable by year, make, model, trim, and drivetrain to confirm fitment before ordering. What This Category Covers Suspension is the highest-leverage handling upgrade on any vehicle. A properly matched shock, spring, and sway bar package produces measurable i...
View Suspension Products
Suspension Packages
Complete suspension packages for street, track, truck, SUV, and off-road builds are stocked at Black Ops Auto Works. Shop matched coilover packages, sport lowering kits, lift and leveling systems, shock packages, handling kits, control arm packages, and staged suspension upgrades for cars, trucks, Jeeps, SUVs, and performance vehicles. Every product is filterable by year, make, model, trim, drivetrain, and suspension configuration. This collection spans Mustang, Camaro, Corvette, GM truck, Ford truck, Jeep, Toyota truck and SUV, European sport compact, and domestic performance applications. What This Suspension Packages Collection Covers Matched component systems Suspension packages pair components engineered to work together, which simplifies planning and reduces the risk of mixing incompatible parts. They can include coilovers or shocks, springs, control arms, sway bars, endlinks, alignment parts, and lift hardware. Street and Sport Lowering Packages Balanced handling and ride...
View Suspension Packages Products