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Auto Parts & Accessories
QA1 1988-98 C1500 Rear Coilover Conversion Systems R140-170
$1,334.86
+ $185.00 flat-rate insured LTL freight
(details)
$1,519.86 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 1988-98 C1500 Rear Coilover Conversion System, Ultimate Performance Upgrade!
The QA1 1988-98 C1500 Rear Coilover Conversion System (R140-170) is a high-performance rear suspension upgrade that replaces outdated leaf springs with adjustable coilovers, an adjustable panhard bar, and trailing arms. This easy-to-install system enhances handling, ride comfort, and suspension control while maintaining full adjustability.
Perfect for street performance, towing, and daily driving applications!
What’s Included in the Kit?
QA1 Adjustable Coilover ShocksFine-tune damping for performance or comfort
170 lbs./in. Coilover SpringsDesigned for a smooth yet stable ride
Adjustable Panhard BarEnsures proper rear axle alignment
Torque Arm Suspension with C-Notch BracketImproves rear-end stability & support
Adjustable Lower Trailing ArmsAllows fine-tuning of suspension geometry
All Necessary Mounting HardwareComplete installation package
Everything you need for a modern-handling C1500 in one complete package!
Technical Specifications
| Feature | Details |
|---|---|
| Brand | QA1 |
| Manufacturer Part # | R140-170 |
| Product Type | Rear Suspension Package |
| Designed For | 1988-98 Chevy/GMC C1500 (10-Bolt Differential Only) |
| Ride Height Adjustment | 4-7 inches of drop |
| Shock Type | Single Adjustable Coilover |
| Coilover Spring Rate | 170 lbs./in. |
| Spring Finish | Gray/Silver |
| Suspension Finish | Black Powdercoated |
| Adjustable Panhard Bar | Yes (On-Car Adjustable) |
| Lower Trailing Arms | Yes (On-Car Adjustable) |
| Trailing Arm Mount Braces | Yes |
| Bed Removal Required? | No |
| Welding Required? | No |
| Hardware Included? | Yes |
| Brake Components Included? | No |
| Quantity | Sold as a kit |
Optimized for enhanced stability, improved traction, and a modern ride feel!
Fitment & Compatibility
Fits 1988-1998 Chevrolet & GMC C1500 Models
Designed for trucks with 10-bolt rear differentials only
Compatible with factory and aftermarket wheels/suspension setups
Ensure proper fitment before purchasing!
Installation Notes & Tips
Direct Bolt-On Installation, No welding or bed removal required
Includes all necessary hardware for easy install
Adjustable panhard bar ensures proper rear axle alignment
Professional installation recommended for best performance
Not compatible with 12-bolt rear differentials
Frequently Asked Questions (FAQ)
How does this system improve handling over stock suspension?
- The QA1 coilover conversion eliminates factory leaf springs and replaces them with adjustable coilovers and a panhard bar, providing better handling, reduced body roll, and superior ride quality.
Is this a direct bolt-on kit?
- Yes! This system bolts directly to factory mounting points with no cutting or welding required.
Can I adjust my ride height with this kit?
- Yes! The system allows for a 4 to 7-inch rear drop for a more aggressive stance.
Will this work with my stock wheels and brakes?
- Yes! The kit is compatible with stock and aftermarket setups.
Does this kit include disc brakes?
- No. The system does not include brakes, but is compatible with factory and aftermarket brake setups.
Call to Action, Upgrade Your C1500’s Suspension Today!
Transform your classic Chevy/GMC truck with the QA1 1988-98 C1500 Rear Coilover Conversion System!
Upgrade your suspension for modern performance
Lower your truck 4-7 inches for a custom stance
Improve handling, ride quality, and axle alignment
Bolt-on installation, No welding or bed removal required!
Order Now & Experience the Best Rear Suspension Upgrade for Your C1500!
OverviewBrand:
QA1
Manufacturer’s Part Number:
R140-170
Part Type:
Rear Suspension Packages
Product Line:
QA1 1988-98 C1500 Rear Coilover Conversion Systems
Summit Racing Part Number:
QA1-R140-170
UPC:
806990158932
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):
170 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.
Notes:
For 4.000-7.000 in. of rear drop. Fit models with 10-bolt rear differentials only.
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
