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QA1 DD501-1501 Pro Rear Weld-In Coilover Kit Double Adjustable Proma Star 150lb/in Spring 3.25in Axle

Manufacturer

Picture for manufacturer QA1 Precision Products

Part Number

DD501-1501
12 reviews
Sale Price

$1,052.95

Estimated ship date Monday, November 23

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Product Details

The QA1 DD501-1501 Pro Rear Weld-In Coilover Kit delivers professional-grade rear suspension performance for drag racing, street performance, and street rod builds. Designed for vehicles with 3.25-inch diameter axle tubes, this complete kit includes everything needed to convert your rear suspension to a fully functional coilover setup.

At the heart of this kit are two QA1 DD501 Proma Star double-adjustable coilover shocks, paired with two 12-inch, 150 lb/in linear rate springs. The double-adjustable valving provides independent compression and rebound control, each with 18 externally accessible adjustment positions — with evenly spaced valving changes so there are no sudden jumps between clicks.

Key Features:

  • Double-adjustable (DD) valving with independent compression and rebound adjustment — 18 positions each
  • Lightweight aluminum shock body construction with ride height adjustability
  • Precision machined aluminum piston with PTFE piston band
  • 5/8" centerless ground, hard chrome-plated solid piston rod
  • Three-step sealing system for long-term durability and leak resistance
  • Designed for 3.25" diameter axle tubes
  • Weld-in upper shock mount tube included: 1-5/8" O.D. x .095" wall x 40" long
  • 100% dyno tested and serialized from the factory
  • Revalveable and rebuildable by QA1 or QA1 Authorized Service Centers
  • Made in the USA
  • Backed by QA1's Limited Lifetime Warranty (registration required at QA1.net/warranty)

Kit Includes:

  • (2) QA1 DD501 Proma Star Double-Adjustable Coilover Shocks
  • (2) 12HT150 Linear Rate Springs — 12 in. length, 150 lb/in. rate
  • Weld-in upper shock mount tubing
  • All mounting and spring hardware

Installation requires welding. A QA1 spanner wrench (P/N T114W or T115W, sold separately) is required for spring seat adjustment. Optional thrust bearing kit P/N 7888-109 is also available separately. This kit is ideal for hot rods, restomods, and performance builds where direct-fit coilover solutions are not available.

Products specifications

Prop 65

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

Title

QA1 Shock Absorber and Coil Spring Assembly DD501-1501

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Ease of ordering. Good price and Product. Quick shipping. Hello from a new customer!!

Quick and easy ordering

Quick and easy.

Ididn't get my discount. Thanks for ripping me off!

Great!

Great website

I think it is an awesome experience because of a transition from one website to another; however, I did not see any tax applying toward these items perhaps.

Easy

easy and efficient

I've had great service, quick shipment and awesome prices from Autoplicity. Definitely would recommend to anyone. I've placed multiple orders with them and everything is great!

Fantastic company! Great selection for every vehicle and fast shipping! I will definitely shop here again.

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