Description

Upgrade your classic Mopar A, B or E body car to a triangulated four-link design with QA1's Mopar rear coilover conversion systems. These QA1 conversion systems will transform the way your classic Mopar launches, handles, and cruises down the road! The great-looking powdercoated components improve performance and save weight—plus, you'll enjoy a much more modern driving feel and improved handling in any setting. Order QA1's Mopar rear coilover conversion system for your application.

Additional features:

* Proven triangulated 4-link design is popular with street/strip machines, pro-touring/road racers and autocross drivers
* Available for Mopar 8 3/4 in., Ford 9 in. and Dana 60 rear axles
* Improved traction during launch
* Easy installation that requires minimal welding
* Supports both standard and inboard spring locations
* Gain greater anti-squat and pinion angle adjustability
* Correct your wheelbase to fit larger wheels and tires
* Has clearance for 3 in. over the axle exhaust
* Single- and double-adjustable shocks eligible for limited lifetime warranty by the manufacturer
* You can add the optional rear sway bar to further reduce body roll during hard launches and cornering
* Made in the USA

Product Overview

QA1 70-74 Mopar E-Body Rear Coil-Over Conversion Kit , Convert your classic Charger, Coronet, Challenger, Barracuda or other Mopar B or E-Body vehicle from leaf spring rear suspension to a QA1 coil-over kit that uses a triangulated 4 link design. This is the best way to gain a more planted feel, make room for larger wheels and tires and correct the wheelbase of classic Mopars. The kit allows you to run a 3" bumper exit exhaust. This modern design instantly delivers a more modern driving experience on the street while giving you the adjustability to maximize performance at the autocross, road course and drag strip. QA1 Mopar rear suspension systems come complete with powder-coated tubular components-including the cross member, upper trailing arms and lower trailing arms-and all installation necessary hardware. Kits work with popular rear axles including Mopar 8 3/4", Ford 9" and Dana 60 rear ends. Choose the appropriate part number when selecting your kit. The MOD Series shocks provide peak performance on the track and drag strip, delivering the aggressive force curves required for top-tier pro touring and drag racing cars. These shocks maximize tunability with modular valve packs. You can dramatically change your valving in minutes without ever taking the shock off the car, losing/contaminating oil or worrying about your nitrogen charge. QA1 coil-over rear suspension systems can be paired with an optional QA1 sway bar to further enhance handling characteristics and prevent body roll during hard launches. QA1 systems are made in the USA. , , Fitment notes: Installation requires a small amount of cutting and welding on the frame and axle housing. This kit works with factory-located leaf spring mounts or modified inboard-located leaf spring mounts.

Features and Benefits

• QA1 uniquely engineered to enhance the performance of your vehicle
• Ride height adjustability
• Adjustable shock valving options for all driving styles
• Easy bolt-in install
• Best-in-class warranty
• Made in the USA

Product Details

Brand:	QA1
Description:	QA1 70-74 Mopar E-Body Mod Series Rear Four Link Suspension System
Manufacturer Part Number:	R355-175
Part Number:	qapR355-175
Prop 65 - Short Label:	WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Prop 65 Yes/No:	Yes
Title:	QA1 Coilover Overhaul Kit R355-175
UPC:	806990164124

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	qapHK33-CRE1	(1x qap52834, 1x qap52830, 1x qap52347-M400, 1x qapR355-175)

Data: v4.2 - Upd: 2026-10-15 05:06:59

Features

Specifications

Product Attributes - Brand

QA1

Product Attributes - Manufacturer's Part Number

R355-175

Product Attributes - Part Type

Rear Suspension Packages

Product Attributes - Product Line

QA1 Mopar Rear Coilover Conversion Systems

Product Attributes - UPC

806990164124

Product Attributes - Third Member Included

No

Product Attributes - Axle Shafts Included

No

Product Attributes - Upper Control Arms Included

No

Product Attributes - Lower Control Arms Included

No

Product Attributes - Air Bags Included

No

Product Attributes - Rear Shocks/Struts Included

Yes

Product Attributes - Rear Shock Type

Double adjustable coilover

Product Attributes - Coilover Springs Included

Yes

Product Attributes - Coilover Spring Rate (lbs/in)

175 lbs./in.

Product Attributes - Spring Finish

Black

Product Attributes - Suspension Package Finish

Black powdercoated

Product Attributes - Bushings Included

Yes

Product Attributes - Bushing Material

Spherical bearing

Product Attributes - Sway Bar Included

No

Product Attributes - Watts Link Included

No

Product Attributes - Panhard Bar Included

No

Product Attributes - Adjustable Panhard Bar Included

No

Product Attributes - Upper Trailing Arms Included

Yes

Product Attributes - Adjustable Upper Trailing Arms Included

Yes

Product Attributes - Adjustable Upper Trailing Arms Type

Double adjustable

Product Attributes - Lower Trailing Arms Included

Yes

Product Attributes - Adjustable Lower Trailing Arms Included

Yes

Product Attributes - Adjustable Lower Trailing Arms Type

Single adjustable

Product Attributes - Trailing Arm Mount Braces Included

Yes

Product Attributes - Trailing Arm Hardware Included

Yes

Product Attributes - Rotors Included

No

Product Attributes - Calipers Included

No

Product Attributes - Quantity

Sold as a kit.

Product Attributes - Notes

Kit for use with Mopar 8 3/4 and Ford 9 in. rear differentials. Includes MOD series coilovers. Clearanced to allow a 3.00 in. over the axle exhaust.

Compatibility