Description

Don't be limited to adjustments! Completely re-valve in minutes with the QA1 MOD Series Pro coilover systems. Designed specifically to meet the demands required by today's high performance drag race and handling/pro-touring cars, QA1's multi-patent-pending MOD Series shocks will transform the way racers respond to changing track conditions and configurations. The key element to this tunability is QuickTune Technology: dry modular valve packs that can easily be swapped out, all while the shocks remain on the car. An industry first, MOD Series shocks can easily be re-valved without interrupting the oil path or opening up the shock for debris and air contamination. Medium compression and rebound valve packs come standard; soft or firm compression and rebound valve packs are also available.

Once the desired valving is in place, the unique double-adjustable design (with adjustable low-speed bleed) allows for fully independent control over the compression and rebound characteristics. With all these adjustability options, MOD Series shocks achieve an expansive force curve capability and an unprecedented level of tunability. The shocks also feature mounting adjustability to accommodate a variety of vehicles and mounting configurations. The nitrogen-charged canister is available in a piggyback or remote configuration for ease of installation in tight areas, and the base eyelet is indexable, so you can unbolt and reattach it at the angle you need for the best shock and canister placement. Like all QA1 shocks, MOD Series coilovers are 100 percent dyno-tested and serialized. Order the kit recommended for your vehicle.

Product Overview

soft or firm compression and rebound valve packs also available. Once the desired valving is in place, the unique double adjustable design, with adjustable low-speed bleed, allows for fully independent control over the compression and rebound characteristics. With all these adjustability options, the MOD Series shock achieves an expansive force curve capability and an unprecedented level of tunability. The shock also features mounting adjustability to accommodate a variety of vehicles and mounting configurations. The nitrogen-charged canister is available in a piggyback or remote configuration for ease of installation in tight areas, and the base eyelet is indexable, so you can unbolt it and reattach it at the angle you need for the best shock and canister placement. Like all QA1 shocks, the MOD Series shock is 100% dyno tested and serialized and proudly made in QA1's Lakeville, Minnesota facility.

Features and Benefits

• 4-way adjustable high and low speed bleed
• QuickTune Technology: dry modular valve packs that can easily be swapped out
• Valve packs shock can quickly and easily be revalved without interrupting the oil path or opening the shock up for debris and air contamination
• Remote or piggyback canister mounting options
• 100% dyno tested and serialized
• Made in the USA

Product Details

Active or Passive Suspension:	Passive
Adjustable Compression:	Yes
Adjustable Rebound:	Yes
Adjustable Ride Height:	Yes
Assembled:	No
Brand:	QA1
Description:	QA1 GM Pro Front Coil-Over System - MOD Series - 11in x 300lbs/in - Flat Large - Aluminum
Grade Type:	Performance
Internal Construction Type:	Dual Tube
Manufacturer Part Number:	MG401-11300C
Part Number:	qapMG401-11300C
Prop 65 - Short Label:	WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Prop 65 Yes/No:	Yes
Remote Reservoir:	Yes
Spring Color:	Silver
Spring Material:	High Tensile Chrome Silicon
Title:	QA1 Shock Absorber and Coil Spring Assembly MG401-11300C
UPC:	806990154644

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
	qapDK23-GMA3	QA1 Level 3 Full Vehicle Drag Racing Suspension Kits DK23-GMA3 Handling Packages, Racing, Coil Springs, Shocks/Struts, Control Arms, Rear Sway Bar, 0-2.000 in. Drop, Buick, Chevy, Olds, Kit
	qapDK23-GMX3	QA1 75-79 GM X-Body Level 3 Drag Kit 2.0 w/ Shocks (1x qap5252, 1x qap52918, 1x qap52920, 1x qap9039-308, 1x qapMG401-11300C, 1x qapT121W, 2x qapTD801)

Data: v4.2 - Upd: 2026-10-15 16:42:43

Features

Specifications

Product Attributes - Brand

QA1

Product Attributes - Manufacturer's Part Number

MG401-11300C

Product Attributes - Part Type

Coilover Kits

Product Attributes - Product Line

QA1 MOD Series Pro Coilover Systems

Product Attributes - UPC

806990154644

Product Attributes - Coilover Kit Position

Front

Product Attributes - Adjustable Valving

Yes

Product Attributes - Number of Valving Selections

576

Product Attributes - Shocks Included

Yes

Product Attributes - Internal Design

Twin-tube

Product Attributes - Coilover Springs Included

Yes

Product Attributes - Spring Rate (lbs/in.)

300 lbs./in.

Product Attributes - Suspension Height Adjustment

0.0-2.0 in. lowered

Product Attributes - Recommended Front-End Weight

1,601-1,700 lbs.

Product Attributes - Gas Charged

Yes

Product Attributes - Extended Length (in.)

12.63

Product Attributes - Collapsed Length (in.)

8.63

Product Attributes - Threaded Adjustment Range

3.000 in.

Product Attributes - Upper Mount

Eyelet

Product Attributes - Lower Mount

Eyelet

Product Attributes - Body Diameter (in.)

3.000

Product Attributes - Shock Body Material

Aluminum

Product Attributes - Shock Body Finish

Black

Product Attributes - Bushing Material

Spherical bearing

Product Attributes - Bushing Color

Natural

Product Attributes - Spring Finish

Gray/Silver

Product Attributes - Crossmember Included

No

Product Attributes - Adjustable Mounting Bracket Included

No

Product Attributes - Hardware Included

No

Product Attributes - Welding Required

No

Product Attributes - Quantity

Sold as a kit.

Product Attributes - Notes

Coilover shocks are double adjustable MOD series shocks with remote canisters. Springs are 11 in. tapered with a large diameter, flat upper end style 11HTBF300 springs. Kit includes Torrington bearings.

Compatibility