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Home Chassis & Suspension Suspension Components QA1 Four Link Conversions R156-170
QA1 1965-72 F-100 Rear Coilover Conversion Systems R120-200
QA1 1965-72 F-100 Rear Coilover Conversion Systems R120-200 $1,486.00
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QA1 1963-87 C10 Front Coilover Conversion Systems 52611-S850
QA1 1963-87 C10 Front Coilover Conversion Systems 52611-S850 $1,458.00

QA1 Four Link Conversions R156-170

$1,255.00

Rear Suspension Package, +2 to -3 Height Adjustment, Adjustable, 170 lbs Springs, Chevrolet, Pontiac, Kit

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Category: Suspension Components
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Description

Overview

Brand: QA1
Manufacturer’s Part Number: R156-170
Part Type: Rear Suspension Packages
Product Line: QA1 Four Link Conversions
Summit Racing Part Number: QA1-R156-170
UPC: 806990175199
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: 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: Welding is required. Includes spanner wrench for coilovers.

QA1 Four Link Conversions

Ditch those clunky leaf springs and take control of your rear suspension with QA1’s coilovers and triangulated 4-link conversions. This upgrade improves ride quality, enhances handling performance, and enables you to dial in the perfect stance. With the added benefit of accommodating wider wheels and tires, this kit is the ideal solution for your car.

QA1’s 4-link conversion delivers handling control without compromising your daily comfort. Perfect for both street and track use, adjustable shocks are famous for their tunability, giving you exceptional handling and control and finer control over your suspension.

Thoughtful design meets effortless installation requiring minimal welding. You’ll experience a painless installation and setup process, where adjusting ride height, pinion angle, or wheelbase is as simple as a few tweaks – no link removal required. No modifications to floor pan required.

Shipping & Delivery
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Effective Date: August 9, 2025

At X Factors Motorsports, we are committed to delivering your order quickly, securely, and affordably.


1. Processing Time

  • Orders are typically processed within 1–2 business days after payment is confirmed.

  • Orders placed on weekends or holidays will be processed on the next business day.


2. Delivery Times

  • Domestic Shipping (United States): Delivery takes 5–7 business days from the date of shipment.

  • International Shipping: Delivery times vary by destination and may take 7–21 business days depending on customs processing and local delivery services.


3. Shipping Rates

  • United States: Free standard shipping on all orders.

  • International: Shipping costs are calculated at checkout based on the delivery address, package weight, and destination country.


4. Carriers Used

We ship orders using trusted carriers such as UPS, FedEx, USPS, and DHL to ensure reliable delivery. Tracking numbers are provided for all shipments.

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    At X Factors Motorsports, we specialize in high-performance engines, outboards, and premium automotive equipment. With expert support, fast shipping, and trusted brands, we help builders, racers, and enthusiasts power their passion — one project at a time.

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