Description

QA1's handling suspension kits provide a full-vehicle upgrade that fits your needs. Available in three different levels of performance, you can build your car in stages, using QA1's parts list as a road map to get to the level of performance you want and have peace of mind knowing you won't have compatibility issues.

Top performance is the desired goal of many automotive upgrades—precisely what QA1 Level 3 handling suspension kits deliver. Compared with the Level 1 and 2 packages, these heavy-duty assemblies offer additional control components, as well as stiffer springs to maximize your cornering ability and handling. QA1 Level 3 kits are available with or without shocks and struts—giving you the flexibility to obtain the shocks or struts and spring rates you want. Select the kit designed for your vehicle.

Product Overview

Product Overview The QA1 Level 3 Handling Kit is a serious upgrade for people seeking ultimate handling and performance from their Fox Body Mustang. The kit includes a lightweight tubular K-member, control arms, boxed trailing arms, sway bars, and front double adjustable coilovers and rear MOD Series coilovers. Tubular Front K-member These are designed to save weight and free up room in your engine bay. Weighing only 25lbs., it's 50% lighter than stock K-members and boasts improved geometry and durability. Interchangeable engine mounts, sold separately, offer flexibility for running factory or late model engines including Coyotes. Inverted Front Struts and Rear Coil-Overs Front struts feature an inverted cartridge design, large diameter shaft, and lightweight aluminum body for improved suspension performance. Paired with lightweight, high-travel springs with hand-selected rates perfect for flat cornering autocross and road race Mustangs. These kits offer up to 2" lower than stock ride height adjustment to dial in the perfect stance. MOD Series rear coilovers provide competition cars with an unmatched level of tunability and control. Lightweight Caster Camber Plates Aluminum caster camber plates improve Mustang handling and performance. Lighter and sleeker than steel, they offer precision adjustment to fine-tune suspension geometry for optimal performance. Tubular Control Arms, Trailing Arms and Rear Sway Bar Tubular control arms, trailing arms, and sway bars solve flexing and bushing bind. Easy, Bolt-In Installation Made in the USA Fitment Notes Engine mounts not included. QA1 offers several mounts for factory engines as well as popular engine swaps which are sold separately. For Fox Body: Kits for early year range Fox Bodies (1979-1986) will retain factory track width (narrow.) Kits for late year range Fox Bodies (1987-1993) will retain track width of the factory '87-'93 V8 cars (wide.) Not compatible with Cobra IRS

Features and Benefits

• 3 levels of kits to choose from for better launch, straight-line stability & consistent performance
• Build in stages
• Carefully curated for maximum performance
• Ultimate ride height and shock tunability
• Strong, lightweight tubular components
• Best-in-class warranty
• Made in the USA

Product Details

Brand:	QA1
Description:	QA1 90-93 Ford Mustang Level 3 Handling Kit w/ Shocks
Manufacturer Part Number:	HK43-FMM3
Prop 65 - Short Label:	WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Prop 65 Yes/No:	Yes
Title:	QA1 Suspension KitHK43-FMM3
UPC:	806990174345

This is a group bundle consisting of:

Image	Qty	SKU	MFR SKU	UPC	Description
	1x	qapT121W	T121W	806990153890	QA1 Spring Seat Nut Spanner Wrench - MOD Series
	1x	qapBAX102	BAX102	806990038968	QA1 79-93 Ford Mustang 5.0L Bump Steer Kit
	1x	qap5255	5255	806990064592	QA1 79-04 Ford Mustang Upper Adjustable Trailing Arms
	1x	qap5221	5221	806990064325	QA1 79-04 Ford Mustang/79-86 Mercury Capri Lower Boxed Trailing Arms
	1x	qapMUK02	MUK02	806990151667	QA1 94-04 Ford Mustang (w/o Engine Mounts) Tubular K-Member
	1x	qap52892	52892	806990065254	QA1 79-93 Ford Mustang Front & Rear Sway Bar Kit (1-1/4in Front & 1in Rear)
	1x	qap52540	52540	806990173836	QA1 79-93 Ford Mustang Control Arm Kit Lower Race
	1x	qapHD02-12300	HD02-12300	806990174109	QA1 90-93 Ford Mustang Proma Star Coilover Strut Kit Double Adjust 300lb/in.
	1x	qapRCK52411	RCK52411	806990174567	QA1 79-04 Ford Mustang 10-175 Rear Pro-Coil Kit MOD-Adj

Bundled group items may ship from multiple locations and could have slightly longer transit times if parts are sourced from different warehouses.

Images in this listing may include individual and/or group shots of the products included in the bundle. Please refer to the table to see a breakdown of what is included. Click on a SKU to see individual item details.

For details on the individual components in this bundle, click here.

Data: v4.2 - Upd: 2026-10-02 03:58:43

Features

Specifications

Product Attributes - Brand

QA1

Product Attributes - Manufacturer's Part Number

HK43-FMM3

Product Attributes - Part Type

Suspension Handling Packages

Product Attributes - Product Line

QA1 Level 3 Full Vehicle Handling Suspension Kits

Product Attributes - UPC

806990174345

Product Attributes - Front Coil Springs Included

Yes

Product Attributes - Rear Coil Springs Included

Yes

Product Attributes - Rear Leaf Springs Included

No

Product Attributes - Front Shocks/Struts Included

Yes

Product Attributes - Front Shock Type

Double adjustable coilover

Product Attributes - Rear Shocks/Struts Included

Yes

Product Attributes - Rear Shock Type

Adjustable coilover

Product Attributes - Front Sway Bar Included

Yes

Product Attributes - Front Sway Bar Color

Black

Product Attributes - Front Sway Bar Type

Hollow

Product Attributes - Front Sway Bar Diameter (in.)

1.250 in.

Product Attributes - Front Sway Bar Diameter (mm)

31.75 mm

Product Attributes - Rear Sway Bar Included

Yes

Product Attributes - Rear Sway Bar Color

Black

Product Attributes - Rear Sway Bar Type

Solid

Product Attributes - Rear Sway Bar Diameter (in.)

1.000 in.

Product Attributes - Rear Sway Bar Diameter (mm)

25.40 mm

Product Attributes - Tie Rod Sleeves Included

No

Product Attributes - End Link Bushings Included

Yes

Product Attributes - Rear Leaf Spring Bushings Included

No

Product Attributes - Sway Bar Bushings Included

Yes

Product Attributes - Upper Trailing Arms Included

Yes

Product Attributes - Lower Trailing Arms Included

Yes

Product Attributes - Trailing Arm Mount Braces Included

No

Product Attributes - Panhard Bar Included

No

Product Attributes - Torque Arm Included

No

Product Attributes - Upper Control Arms Included

No

Product Attributes - Lower Control Arms Included

Yes

Product Attributes - Control Arm Style

Tubular

Product Attributes - Control Arm Material

Steel

Product Attributes - Control Arm Color

Black

Product Attributes - Front Strut Tower Bar Included

No

Product Attributes - K-Member Included

Yes

Product Attributes - K-Member Support Brace Included

No

Product Attributes - Rear Strut Tower Bar Included

No

Product Attributes - Subframe Connectors Included

No

Product Attributes - Chassis Stiffener Included

No

Product Attributes - Calipers Included

No

Product Attributes - Rotors Included

No

Product Attributes - Brake Pads Included

No

Product Attributes - Brake Lines Included

No

Product Attributes - Wheel Studs Included

No

Product Attributes - Center Link Included

No

Product Attributes - Spindles Included

No

Product Attributes - Inner Tie Rod Ends Included

No

Product Attributes - Outer Tie Rod Ends Included

No

Product Attributes - Mounting Hardware Included

Yes

Product Attributes - Quantity

Sold as a kit.

Product Attributes - Notes

Kit will retain factory track width. Not compatible with Cobra IRS. Bump steer kit included.

Compatibility