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QA1 Kit, Pro-Rear, C-O MOD-ADJ. 3.00 - DM501-12150

QA1 Pro-Rear System DM501-12150

Revitalize your vehicle's rear suspension with the QA1 Pro-Rear System DM501-12150. Designed for enthusiasts who demand precision and performance, this system is perfect for drag racing, street performance, and classic street rod applications.

Key Features

  • Adjustable Options: Choose from various configurations including Simultaneous Compression and Rebound Single Adjustable (DS), Independent Compression & Rebound Double Adjustable (DD), or Ride Sensitive Non-Adjustable (ALN).
  • Precision Engineering: Each shock features evenly spaced valving changes throughout the adjustment range, ensuring smooth transitions without any jumps between clicks.
  • Coil-Over Design: The lightweight aluminum construction allows for ride height adjustments, making it easy to customize your setup.
  • High-Quality Components: Each shock includes a precision machined aluminum piston with a PTFE piston band, a solid piston rod, and a three-step sealing system for durability.
  • Complete Kit: The DM501-12150 package comes with two Proma Star or Aluma Matic Shocks, two linear or variable rate springs rated at 150, and all necessary mounting hardware.
  • Made in the USA: Quality you can trust, with every component 100% dyno tested and serialized for reliability.

Specifications

  • Shock Type: MOD series custom mount coil-over shocks
  • Spring Rate: 150
  • Axle Tube Compatibility: Fits 3" or 3.25" diameter axle tubes
  • Rebuildable: Revalveable and rebuildable by QA1 factory or authorized service centers

Benefits of the DM501-12150

This Pro-Rear System is engineered to provide the ideal horsepower curve to maximize performance on the track or street. The adjustable features allow you to fine-tune your setup, ensuring optimal handling and comfort. Whether you're hitting the drag strip or cruising down the boulevard, the QA1 Pro-Rear System delivers the performance you need.

Customer Insights

Users have praised the DM501-12150 for its ease of installation and noticeable improvement in handling. Many have noted that the adjustable settings allow for a customizable ride experience, making it suitable for various driving styles. The durability and performance have also garnered positive feedback, with customers appreciating the quality of materials and construction.

Other Part Numbers:
QA1 #qapDM501-12150

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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Who is QA1?

QA1 is a company that was founded in 1993. They specialize in manufacturing high-quality suspension parts, shock absorbers, composite driveshafts, bearings, steering components, and other related accessories. Their products are used in different industries such as the industrial, motorsports, and automotive sectors. Today, they are the leading manufacturer of OE parts in the market.

Suspension Experts

The company is best known for its motion control sub-assemblies and wide range of suspension systems. They are always searching for new ways to develop each component to enhance their products further. 

State-of-the-Art Facility

The company is housed in one of the most sophisticated facilities in the market to accommodate the increasing demands of its customers. With 100,000 square feet at their disposal, their facility contains high-tech equipment such as a CNC machine, laser cutting equipment, hydraulic presses, and filament windings. It allows them to manufacture the best product in the market.

QA1 is also one of the few companies that are ISO certified. It guarantees that their parts are manufactured consistently, following the standards put in place by the company and the regulators.

Purchase QA1 Products At Vivid Racing

If you are in the market for quality suspension parts for your vehicle, then QA1 is the brand for you. They have been manufacturing components for the last 28 years and have consistently given their customers parts that meet their demand. To know more about QA1, visit Vivid Racing and check out their list of parts that meet your demand.



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Things
Sale price None
Wholesale price $2,061.05
Shipping Weight: 30.80
Length: 40
Width: 8
Height: 8
Product Added At Monday 23 December, 2024
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By Turn_API
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Emissions Info
Carb Approved -
Carb Number -
Epa Status N/A
Prop65 Yes
Carb Required -
Vendors
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Vendor Inv Cost Retail Jobber MAP Core Updated
Turn 14 $1,746.65 $2,283.20 ? $2,060.95 ? 2025-07-11 10:45:12

Manufacturer Direct Shipping
This item is available for direct shipping from the manufacturer. Please verify stock availability with the manufacturer. Once confirmed, you can place an order through [Meyer Distributing], who will arrange for dropshipping from the manufacturer directly to our customer.

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