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Condition notes recorded before palletizing.
30-Day Startup Warranty
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Auto Parts & Accessories
QA1 1965-72 F-100 Rear Coilover Conversion Systems R120-250
$1,245.81
+ $185.00 flat-rate insured LTL freight
(details)
$1,430.81 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 1965-72 F-100 Rear Coilover Conversion System, Ultimate Performance & Adjustability!
The QA1 1965-72 F-100 Rear Coilover Conversion System (R120-250) is a high-performance rear suspension upgrade engineered for classic Ford F-100 trucks. This system replaces the factory leaf springs with a fully adjustable coilover setup, allowing for a 4” to 7” drop while enhancing ride quality, traction, and handling precision.
Designed for a bolt-in installation, this system does not require bed removal, making it an easy upgrade for enthusiasts and builders alike!
Perfect for custom builds, street trucks, and pro-touring F-100s!
What’s Included in the Kit?
Single Adjustable Rear Coilover ShocksFine-tune damping for street & track performance
250 lbs./in. Coilover Springs (Gray/Silver Finish)Provides a balance of comfort & performance
Adjustable Lower Trailing ArmsOn-car adjustability for easy suspension tuning
Adjustable Torque Arm & Axle MountControls axle wrap & improves traction
Torque Arm Crossmember for Frame Stability & Rigidity
Adjustable Panhard Bar with BraceMaintains proper axle positioning
All Necessary Mounting Hardware for a Complete Installation
Transform your classic truck’s ride and handling with QA1’s premium rear coilover conversion system!
Technical Specifications
| Feature | Details |
|---|---|
| Brand | QA1 |
| Manufacturer Part # | R120-250 |
| Product Type | Rear Coilover Conversion Kit |
| Drop Range | 4” to 7” |
| Rear Shock Type | Single Adjustable Coilover |
| Coilover Springs Included? | Yes |
| Spring Rate (lbs./in.) | 250 lbs./in. |
| Suspension Package Finish | Black Powdercoated |
| Panhard Bar Included? | Yes |
| Adjustable Panhard Bar? | Yes (On-Car Adjustable) |
| Lower Trailing Arms Included? | Yes (Adjustable) |
| Upper Trailing Arms Included? | No |
| Adjustable Torque Arm Included? | Yes |
| Torque Arm Crossmember Included? | Yes |
| Bushings Included? | No |
| Sway Bar Included? | No |
| Watts Link Included? | No |
| Brake Components Included? | No |
| Welding Required? | No |
| Quantity | Sold as a kit |
A must-have upgrade for F-100 owners looking to modernize their truck’s suspension for a sleek stance and superior ride quality!
Fitment & Compatibility
Designed for 1965-72 Ford F-100 Trucks
Direct Bolt-In for Factory Rear Suspension Replacement
Works with OEM & Aftermarket Performance Suspension Components
Perfect for Street, Pro-Touring, & Custom Truck Applications
Ideal for builders and enthusiasts seeking a modern coilover conversion with easy adjustability and superior handling!
Installation Notes & Tips
100% Bolt-On Installation, No Welding or Bed Removal Required
Ensure Proper Suspension Alignment for Optimal Performance
Adjust Ride Height & Axle Positioning Before Final Tightening
Pair with QA1 Front Suspension for a Fully Balanced System
Professional Installation Recommended for Best Results
Frequently Asked Questions (FAQ)
What makes this coilover conversion better than leaf springs?
- The coilover system provides a smoother ride, more precise handling, and greater adjustability, whereas leaf springs offer limited tuning options and more axle wrap.
How adjustable is the drop on this kit?
- This kit allows for a 4” to 7” drop, making it perfect for custom stance setups while maintaining ride quality.
Can I install this kit without removing the truck bed?
- Yes! Unlike many other suspension conversions, this QA1 kit is bolt-in and does not require bed removal.
Does this kit work with my stock F-100 axle?
- Yes! The kit is designed to work with factory or aftermarket axles, making it a versatile choice for most builds.
Is this kit suitable for daily driving?
- Absolutely! The single adjustable coilovers allow for tunable ride comfort, making it great for both daily driving and performance applications.
Call to Action, Upgrade to Modern Coilover Suspension Today!
Enhance your F-100’s stance, ride quality, and handling with the QA1 Rear Coilover Conversion System!
Bolt-In Installation, No Welding or Bed Removal Required
4” to 7” Adjustable Drop for a Custom Stance
Single Adjustable Coilovers for Tunable Comfort & Control
Ideal for Street, Pro-Touring, & Custom Builds
Order Now & Experience the Ultimate F-100 Suspension Upgrade!
OverviewBrand:
QA1
Manufacturer’s Part Number:
R120-250
Part Type:
Rear Suspension Packages
Product Line:
QA1 1965-72 F-100 Rear Coilover Conversion Systems
Summit Racing Part Number:
QA1-R120-250
UPC:
806990155917
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):
250 lbs./in.
Spring Finish:
Gray/Silver
Suspension Package Finish:
Black powdercoated
Bushings Included:
No
Sway Bar Included:
No
Watts Link Included:
No
Panhard Bar Included:
Yes
Adjustable Panhard Bar Included:
Yes
Adjustable Panhard Bar Type:
On car adjustable
Upper Trailing Arms Included:
No
Adjustable Upper Trailing Arms Included:
No
Lower Trailing Arms Included:
Yes
Adjustable Lower Trailing Arms Included:
Yes
Adjustable Lower Trailing Arms Type:
On car adjustable
Trailing Arm Mount Braces Included:
Yes
Trailing Arm Hardware Included:
Yes
Rotors Included:
No
Calipers Included:
No
Quantity:
Sold as a kit.
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
