In Stock
Inspected & Documented
Condition notes recorded before palletizing.
30-Day Startup Warranty
Covers block, heads and internal moving components.
In Stock & Ready to Freight
Auto Parts & Accessories
QA1 Mopar Rear Coilover Conversion Systems R155-175
$1,067.71
+ $185.00 flat-rate insured LTL freight
(details)
$1,252.71 delivered to the continental US
- Palletized and heavy shrink-wrapped for freight
- LTL carrier delivery with optional liftgate service
- Ships in 1–2 business days from Los Angeles, CA
- Transit typically 3–7 business days, continental US
Secure checkout by Stripe
Need a matched transmission, controls or wiring package? Speak with a parts specialist.
Details & Inspection Notes
QA1 Mopar Rear Coilover Conversion System, Upgrade Your Classic Mopar’s Suspension!
The QA1 Mopar Rear Coilover Conversion System (R155-175) is an all-in-one solution to transform your classic Mopar A, B, or E-Body muscle car into a high-performance machine. This bolt-in triangulated 4-link rear suspension setup improves launch traction, ride comfort, and adjustability, giving you the perfect stance and modern handling feel.
Designed for street performance, autocross, drag racing, and pro-touring applications!
Perfect for classic Mopar owners who want better suspension geometry and adjustability!
What’s Included in the Kit?
Rear Coilover Shocks (Single Adjustable)Tune your suspension for ride comfort or performance
175 lbs./in. Coilover SpringsOptimized for street & track driving
Adjustable Upper & Lower Trailing ArmsDial in wheelbase, traction, and handling
Trailing Arm Mount Braces & HardwareReinforces chassis for added stability
Clearance for 3” Over-the-Axle ExhaustNo need to modify your exhaust system
Supports Standard & Inboard Spring LocationsMore flexibility in suspension setup
Upgrade your Mopar’s rear suspension with modern 4-link geometry and coilover adjustability!
Technical Specifications
| Feature | Details |
|---|---|
| Brand | QA1 |
| Manufacturer Part # | R155-175 |
| Product Type | Rear Coilover Conversion System |
| Suspension Design | Triangulated 4-Link |
| Rear Shocks Included? | Yes (Single Adjustable Coilovers) |
| Coilover Spring Rate | 175 lbs./in. |
| Spring Finish | Black |
| Suspension Finish | Black Powdercoated |
| Bushings Included? | Yes (Spherical Bearings) |
| Adjustable Upper Trailing Arms? | Yes (Double Adjustable) |
| Adjustable Lower Trailing Arms? | Yes (Single Adjustable) |
| Supports Axles | Mopar 8 3/4″, Ford 9″, Dana 60 |
| Ride Height Adjustment? | Yes |
| Exhaust Clearance? | Yes (3” Over-the-Axle Clearance) |
| Installation Type | Bolt-On (Minimal Welding Required) |
| Sway Bar Included? | No (Optional Add-On) |
| Panhard Bar Included? | No |
| Quantity | Sold as a Complete Kit |
Achieve modern performance while keeping your Mopar’s classic style!
Fitment & Compatibility
Designed for Classic Mopar A, B, & E-Body Vehicles
Compatible with Mopar 8 3/4″, Ford 9″, and Dana 60 Rear Differentials
Works with Standard & Inboard Spring Locations
Supports Large Wheels & Tires with Wheelbase Adjustments
Ideal for both street and track builds!
Installation Notes & Tips
Minimal welding required, Mostly bolt-in for easier installation
Provides better suspension geometry & weight distribution
Allows fine-tuning of pinion angle & wheelbase for maximum performance
For best results, pair with QA1’s front coilover conversion system
Professional installation recommended for optimal performance!
Frequently Asked Questions (FAQ)
How does this system improve handling?
- The triangulated 4-link design and coilover shocks enhance traction, stability, and ride comfort, reducing wheel hop and increasing control during acceleration and cornering.
What rear axle does this kit support?
- This kit is designed to work with Mopar 8 3/4″, Ford 9″, and Dana 60 rear axles.
Do I need to modify my exhaust?
- No! This kit is designed with 3” over-the-axle exhaust clearance, so you won’t need to alter your existing exhaust system.
Is welding required?
- Minimal welding is needed. Most components bolt directly into place for easier installation.
Can I install this kit myself?
- Yes, if you have experience with suspension work. Otherwise, professional installation is recommended for best results.
Does this kit include a sway bar?
- No, but an optional rear sway bar is available separately for added stability and cornering performance.
Call to Action, Upgrade Your Classic Mopar Today!
Transform your Mopar’s rear suspension for modern performance and adjustability!
Triangulated 4-Link Suspension for Maximum Control
Adjustable Coilovers for Custom Ride Height & Handling
Compatible with Multiple Axles & Large Wheel/Tire Combos
Bolt-In Installation with Minimal Welding Required
Order Now & Experience the Ultimate Rear Suspension Upgrade for Your Mopar!
OverviewBrand:
QA1
Manufacturer’s Part Number:
R155-175
Part Type:
Rear Suspension Packages
Product Line:
QA1 Mopar Rear Coilover Conversion Systems
Summit Racing Part Number:
QA1-R155-175
UPC:
806990163134
Third Member Included:
No
Axle Shafts Included:
No
Upper Control Arms Included:
No
Lower Control Arms Included:
No
Air Bags Included:
No
Rear Shocks/Struts Included:
Yes
Rear Shock Type:
Single adjustable coilover
Coilover Springs Included:
Yes
Coilover Spring Rate (lbs/in):
175 lbs./in.
Spring Finish:
Black
Suspension Package Finish:
Black powdercoated
Bushings Included:
Yes
Bushing Material:
Spherical bearing
Sway Bar Included:
No
Watts Link Included:
No
Panhard Bar Included:
No
Adjustable Panhard Bar Included:
No
Upper Trailing Arms Included:
Yes
Adjustable Upper Trailing Arms Included:
Yes
Adjustable Upper Trailing Arms Type:
Double adjustable
Lower Trailing Arms Included:
Yes
Adjustable Lower Trailing Arms Included:
Yes
Adjustable Lower Trailing Arms Type:
Single adjustable
Trailing Arm Mount Braces Included:
Yes
Trailing Arm Hardware Included:
Yes
Rotors Included:
No
Calipers Included:
No
Quantity:
Sold as a kit.
Notes:
Kit for use with Mopar 8 3/4 and Ford 9 in. rear differentials.
Startup & Installation Checklist
- Replace timing components, water pump and plugs before initial startup where applicable.
- Refill all fluids with manufacturer-specified oil and coolant.
- Verify sensors, ECU pinouts and grounds against your chassis or hull wiring.
- Startup warranty covers heads, block and internal lubricated components for 30 days from delivery.
Full terms: 30-day startup warranty · returns
