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QA1 GS401-11250C Front Pro Coil Single Adjustable Coilover Shock Kit GM 11in 250lb/in

(Chevrolet Silverado 1500 1999-2004, S10 1982-2004, Malibu 1973-83, Chevelle 1973-83, El Camino 1973-87, Monte Carlo 1973-88, Nova 1975-79 + 18 more models)

Manufacturer

Picture for manufacturer QA1 Precision Products

Part Number

GS401-11250C
20 reviews
Sale Price

$789.95

Estimated ship date Saturday, November 21

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Fitment guaranteed

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Product Details

The QA1 GS401-11250C is a front Pro Coil single adjustable coilover shock kit designed as a bolt-in upgrade for GM muscle cars and classic vehicles. Featuring a lightweight billet aluminum shock body paired with an 11-inch, 250 lb/in tapered flat large coil spring, this kit delivers a meaningful improvement in stance, ride quality, and handling performance over stock suspension components.

At the heart of this system is QA1's single adjustable valving, which provides 18 clicks of simultaneous compression and rebound adjustment via a single knob — making it easy to tune from a soft, comfortable cruise to firm, performance-oriented handling without tools or complexity. The shock body is fully threaded, allowing 0 to –2 inches of ride height adjustability with a simple turn of the spring seat nut.

The included high-travel spring is purpose-built for QA1 Pro Coil systems, featuring fewer coils and a smaller wire diameter for increased suspension travel and reduced unsprung weight. The compressed length is 10.13 inches and the extended length is 14 inches.

Key Features:

  • Single adjustable valving with 18 simultaneous compression and rebound settings
  • Lightweight billet aluminum coilover shock body
  • Includes 11-inch spring rated at 250 lb/in with large tapered flat end
  • Compressed length: 10.13 in. | Extended length: 14 in.
  • Ride height adjustable from 0 to –2 inches via threaded shock body
  • Easy bolt-in installation — compatible with stock and QA1 tubular control arms
  • 100% dyno tested and serialized from the factory
  • Serviceable and rebuildable by QA1 authorized service centers
  • Suitable for drag racing, street performance, autocross, road racing, and street rod use
  • Sold as a pair | Made in the USA
  • Backed by QA1's Limited Lifetime Warranty (registration required at QA1.net/Warranty)

A spanner wrench (P/N T114W or T115W) is required for installation. Optional thrust bearing kit (P/N 7888-109) is also available separately.

Products specifications

Fits

Chevrolet Silverado 1500 1999-2004, S10 1982-2004, Malibu 1973-83, Chevelle 1973-83, El Camino 1973-87, Monte Carlo 1973-88, Nova 1975-79; Pontiac Grand Prix 1973-87, Grand Am 1973-75, 1978-80, Bonneville 1978-87, LeMans 1973-81 + 14 more models

Adjustable Mounting Bracket Included

No

Adjustable Valving

Yes

Coil-Over Kit Position

Front

Coil-Over Springs Included

Yes

Compressed Height

9

Crossmember Included

No

Extended Height

12.8

Gas Charged

No

Internal Design

Twin-tube

Notes

Designed to fit small block engines. Shocks are remote ready, they can be used with the QA1 two or four channel remote adjustable system.

Number of Valving Selections

12

Quantity

Sold as a kit.

Recommended Front-End Weight

1,500-1,700 lbs.

Ref No

30

Shock Body Finish

Clear anodized

Shock Body Material

Aluminum

Shocks Included

Yes

Spring Finish

Silver powdercoated

Spring Rate (lbs/in)

250 lbs./in.

Suspension Height Adjustment

Stock

Welding Required

No

Title

QA1 Coilover Spring and Shock Assembly GS401-11250C

Prop 65

WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov

Fast shipping -

I am very pleased with the item I received. I am disappointed that the shipping cost was so expensive. I am an ebay seller and this would not have cost half of what i was charged.

Shipped out very fast, received it same week I ordered it

I ordered a truck bed cover and Autoplicity had the lowest price I could find. I was a bit concerned that the delivery time might be longer than from other suppliers but to my surprise it arrived in just over a week. Customer service was good too. They answered all the questions I had about my order prior to shipment.

THMotorsports always take of me when I order parts from them

Fantastic transaction!

Fast service good price

competitive and easy

Got what I needed for a good price.

Good Price and fast processing order.

They had the lowest price and great communication. Will order from them again thanks

Great customer service. Quick process and shipped les than 24hrs after order. 5 stars.

The ordering process was easy and the price of the product was fair. I was; however, disappointed with one thing. I received an email from Autoplicity for 25% off shipping but it would not work when I was checking out. I called the customer service number and the gentleman was not helpful at all.

Fast service

Fast and easy. Good prices

Paypal payment was a little awkward but it looks like it worked

Purge valve could be cheaper. But ill buy that in town.

Great prices will shop here again.

I am extremely satisfied with Autoplicity in terms of service, price, and shipping. I was shopping for a set of N-FAB step bars for my truck and was ready to purchase from Amazon when I decided to look around to see if there were better prices. I stumbled upon Autoplicity and was surprised to see their price on the bars. I checked with their online chat customer service to confirm that they would fit my truck and that the price was for a pair of the bars and not just one. (That's how low the price was!). I then placed my order and the bars arrived at my doorstep 3 days later! Autoplicity gets an A+ in my book and I'll definitely be coming back.

Really pleased with the service I had. They had the best price I could find, and they shipped quickly. Highly satisfied

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