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QA1 DD501-12175V Pro Rear Double Adjustable Coilover Kit 175/350 Variable Rate Springs

Manufacturer

Picture for manufacturer QA1 Precision Products

Part Number

DD501-12175V
11 reviews
Sale Price

$1,060.95

Estimated ship date Monday, November 23

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The QA1 DD501-12175V is a complete Pro Rear Coilover System engineered for performance street and track applications. This kit features double adjustable shock absorbers that allow independent tuning of compression and rebound damping, giving drivers precise control over ride quality and handling characteristics.

Each shock is paired with a variable rate coil spring rated at 175/350 lbs/in, offering a progressive spring curve that provides a compliant initial response while building resistance under heavier loads — ideal for performance driving and load-sensitive rear suspensions.

Key Features:

  • Double Adjustable Shocks — Independent compression and rebound adjustment for fine-tuned damping control
  • Variable Rate Springs (175/350 lbs/in) — Progressive spring rate delivers a versatile performance and comfort balance
  • Complete Rear System — Includes two coilover shocks and two springs
  • All Mounting Hardware Included — Ready-to-install kit with necessary fasteners and hardware
  • Custom Mount Design — Engineered for precise fitment and optimal suspension geometry
  • Built by QA1 Precision Products, a trusted name in performance suspension engineering

Whether you're building a dedicated track car or a high-performance street machine, the QA1 DD501-12175V rear coilover kit delivers the adjustability and quality construction needed to dial in your suspension setup with confidence.

Products specifications

Adjustable Mounting Bracket Included

Yes

Adjustable Valving

Yes

Bushing Color

Natural

Bushing Material

Steel

Coil-Over Kit Position

Rear

Coil-Over Springs Included

Yes

Collapsed Length (in)

11.625 in.

Crossmember Included

Yes

Extended Length (in)

17.000 in.

Gas Charged

No

Lower Mount

Eyelet

Notes

Includes 12 in. coil-over springs. Shocks are remote ready, they can be used with the QA1 two or four channel remote adjustable system.

Number of Valving Selections

576

Quantity

Sold as a kit.

Recommended Rear-End Weight

1,551-1,850 lbs.

Shock Body Finish

Clear anodized

Shock Body Material

Aluminum

Shocks Included

Yes

Spring Finish

Silver powdercoated

Spring Rate (lbs/in)

175-350 lbs./in.

Suspension Height Adjustment

Stock

Upper Mount

Eyelet

Variable Rate Springs

1551-1850 lbs (12-175/350 Springs)

Welding Required

Yes

Prop 65

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

Title

QA1 Shock Absorber and Coil Spring Assembly DD501-12175V

Had the product I wanted and at the lowest price. Thank you for the outstanding service!<br><br>-M

A few items could have a better description.

Really good prices and fast delivery.

Easy search, easy cart.

great deals

So far so good

Let you know after I get my product I have received my goods and all is well great job guys

Easy to use

This was an excellent transaction! I ordered parts on Sunday and they arrived tuesday afternoon. Low price, no fuss and super fast. Thanks Autoplicity..........

Would not take my promo code....

Fast shipping and saved $60 on a $399 item. However you have to verify your part #'s with the vendor. The part discription on autoplicity sometimes is not what you get. I ordered an item that said it was an O2 plug and bung but when it showed up it was just the bung plug sold separate and customer service basically said it was my bad for not checking for a more accurate discription on the Allstar web site.

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