QA1 HD Pro Rear Weld-In Coilover Kit 250lb/in. MOD-Adj. 3.25in

Additional Information

HD Pro Rear System includes two MOD Series adjustable coilover shocks, two springs, 40" long weld-in tube, and all mounting hardware.

Part Type

Coilover Adjustable Spring Lowering Kit

Product Overview

Product Overview QA1's Heavy Duty Pro Rear Systems are the perfect solution to add coilovers to your car or truck. Designed for any vehicle with a 1700-2600 lbs. rear axle weight, this kit includes all the necessary hardware and bracketry for a seamless installation. With double shear bracketry and increased spring rates, it ensures the strength and support you need for street and race applications. This simple weld-on kit features axle mount bracketry, upper shock mounts and tubing, and fully adjustable QA1 coilover shocks and springs. Ride Height Adjustability Our axle-mounted brackets offer increments of adjustment, and the coilover shock allows for fine-tuning. Combined, you will have a total of 9 of ride height adjustability, giving you full control for your desired stance. MOD Series Coil-Overs Designed for top builds wanting more tunability and aggressive force curves, these shocks feature modular valve packs, allowing valving changes without removing them from the car. With high-speed and low-speed bleed adjustability, these shocks are both streetable and able to get high-horsepower cars down the drag strip. Easy, Weld-In Installation Each kit comes complete with the essential brackets, tabs, and hardware, making it a simple weld-on solution to get the job done efficiently without excess fabrication or trips to the parts store. 1 Year Warranty QA1 warrants that the products will be free from defects in material and workmanship for one year from date of sale to the original purchaser. Made in the USA QA1's Heavy Duty Pro-Rear Systems is proudly made in Lakeville, Minnesota. Fitment Notes Welding required Designed for 3.25 axle tubes Included tubular upper shock mount dimensions are 1-5/8 diameter x .095 wall, 40 long Requires use of QA1 spanner wrench T121W

• All mounting hardware included
• Available with MOD Series, double, single or non-adjustable valving options
• Excellent DIY solution for drag, street performance & street rodders alike
• Made in the USA

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Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Coilover Kits, Rear MOD Series HD Pro Coilover Conversion, Adjustable Valving, 250 lbs./in. Rate Springs, Designed for 3.25 in. Axle Tubes, Kit

The MOD Series shocks included with QA1 rear MOD Series HD Pro coilover conversion systems are designed specifically to meet the demands of today's high-performance drag race, pro-touring, and track cars, which require higher force curves as their performance levels increase. They feature a unique, double-adjustable design with variable low-speed bleed. This allows for fully independent control over the compression and rebound characteristics, making these among the most capable shocks currently available. The key elements to this range of adjustment are the QuickTune valve packs--modular valve packs available in multiple force curves that can easily be swapped out without completely disassembling the shock, an industry first. Get low and high-speed compression with adjustable rebound when your order the QA1 rear MOD Series HD Pro coilover conversion systems best suited for your application.

Product features and items include:
• Impressive force curve capability and high level of precise tunability while still on the vehicle
• Patented QuickTuneâ„¢ valve packs in MOD Series shocks allow re-valving to be completed in minutes without interrupting the oil path and opening the shock
• Valve packs also eliminate the chance of debris and air contamination that can happen during traditional re-valving
• Indexable base eyelets easily unbolt and reattach for mounting flexibility to achieve the best shock and canister placement
• External canister (60 psi nitrogen-charged) mounting flexibility (piggyback or remote)
• MOD Series shocks are designed for the highest performing autocross, road race, track day, and drag race competition vehicles