QA1 Pro Rear Parallel 4-Link Systems R175-150

Name: QA1 Pro Rear Parallel 4-Link Systems
Brand: QA1
SKU: QA1-R175-150
Price: 1880.95 USD
Availability: InStock
Rating: 0 (0 reviews)

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Part Number: QA1-R175-150

$1,880.95

QA1 Pro Rear Parallel 4-Link Systems

4-Link, Pro, Parallel, Diagonal Link, Shock Mounts, Weld-On, Single Adjustable Coilover, 150 lbs., Universal, Kit
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QA1 Pro Rear Parallel 4-Link Systems R175-150

QA1-R175-150

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Part Number: QA1-R175-150

Estimated Ship Date: Oct 23, 2026

$1,880.95

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Overview

Applications

Q&A

Instructions & Calculators

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Overview

Brand:

QA1

Manufacturer's Part Number:

R175-150

Part Type:

Suspension Link Kits

Product Line:

QA1 Pro Rear Parallel 4-Link Systems

Summit Racing Part Number:

QA1-R175-150

UPC:

806990232908

Overall Length (in.):

25.50 in.

Crossmember Included:

Yes

Diagonal Link Included:

Yes

Shock Mounts:

Yes

Wheelie Bar Mounts:

Tube Finish:

Natural

Tube Material:

Steel

Upper Tube Diameter (in.):

1.250 in.

Lower Tube Diameter (in.):

1.250 in.

Rod Ends Included:

Yes

Hardware Included:

Yes

Welding Required:

Yes

Axle Tube Diameter (in.):

3.00

Quantity:

Sold as a kit.

Notes:

Includes single adjustable coilover shocks with 150 lbs. spring rate.

QA1 Pro Rear Parallel 4-Link Systems

QA1's Pro Rear Parallel 4-Link systems with panhard bar kits simplify the fabrication process for vehicles that lack aftermarket suspension support—and offer an easy solution that provides ride height adjustability and a simple installation process. These DIY kits produce professional-quality results and great looks in a convenient package. Designed for the DIY enthusiast, each kit contains high-quality, MIG-weldable components that ensure a safe and well-engineered design that'll give your favorite truck or hot rod the stance and ride quality it deserves. The systems are available in three models:

* Basic, with no shocks or springs
* Single-adjustable, with coilover shocks (150 lb. spring rate)
* Double-adjustable, with coilover shocks (150 lb. spring rate)

ADAPTABILITY: Kits include all necessary components and hardware for assembling and mounting the trailing arms, shock mounts, and panhard bar. The raw components can be cut to length and welded as needed, allowing for seamless adaptation to a wide range of applications.

PACKAGING and SIMPLICITY: The parallel 4-link system, by design, packages easily into many applications, making it an ideal solution where space is limited. The parallel 4-link system is easy to tune, making it a great choice for DIY mechanics while still meeting the demands of high-end builds. Powdercoated trailing arms with forged bushing ends offer great looks, durability, and offer a smooth, compliant ride.

TUNABILITY and RIDE HEIGHT ADJUSTMENT: Adjustable coilover brackets provide ride height adjustment so you can tune in the perfect stance for your ride. The included panhard bar and adjustable trailing arms ensure you can fine-tune your axle position and pinion angle for proper function and control.

KIT CONTENTS:
-- Powdercoated trailing arms with forged bushings and provide adjustment from 24 5/8 in. to 25 1/2 in. in length
-- Trailing arm axle brackets for 3 in. axle tubes
-- Panhard bar max length 37 in.
-- 40 in. trailing arm crossmember
-- 40 in. shock crossmember and mounting tabs
-- All required hardware
-- NOTE: Single- or double-adjustable models also include coilover shocks