QA1 Heavy Duty Pro Rear Drag 4-Link System - MOD Shocks - 150lb Springs - R370-150

Product Overview: QA1's Heavy Duty Pro Rear Drag 4-link system streamlines the fabrication process, delivering professional-grade results and performance in a convenient, easy-to-order kit from one source. This 4-link system is designed for the hardcore, do-it-yourself racer looking for a solution to take their vehicle to the next level. High quality, MIG-weldable components ensure a safe and properly engineered design that can be easily adapted into many drag racing setups. Find convenience, safety, and performance all from QA1 with the HD Pro Rear Drag 4-Link. Performance: This drag race-style 4-link design is known for its performance and adjustability, with a wide range of instant center tuning and on-car adjustability. The components can be cut to length to work in any setup with 40 inch or narrower frame-rails. QA1's 7 inch travel, track-proven shocks round out the kit and offer adjustability for track conditions, and plenty of travel. Heavy Duty Design: This heavy-duty design can handle demands of high-performance racing. With inch-thick plates, 1-1/4 inch trailing arm tubes, Grade 8 hardware, and QA1 chromoly rod ends, these kits are built to put down serious power. Adaptability: This kit contains all the components and hardware needed for assembly and mounting of the trailing arms, shocks, springs, and uses a diagonal link for lateral locating. All components can be purchased individually if different configurations are required. Look to QA1 for components that will help in any drag race suspension. Kit Contents: 22 Trailing arms, brackets, rod ends, tube adapters 40 shock crossmember and mounting tabs 40 Diagonal link kit with mounting brackets Grade 8 hardware MOD Series 4-way Adjustable Coilover Shocks Fitment Notes Welding required Trailing arm tubes and diagonal links can be cut to length Works with 3 in. axle tubes Works on 40 in. and narrower frame rails

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Please note image may vary from product. Also, some items are special order. If delivery time is a concern, please contact us prior to purchase. 

Fidanza Performance is excited to offer QA1 Suspension

About - QA1 Suspension​

QA1 Precision Products, Inc., founded in 1993 and based in Lakeville, Minnesota, is a leading American manufacturer of high-performance suspension and driveline components. The company is known for producing quality coil-over kits, control arms, sway bars, adjustable shocks, and carbon fiber driveshafts, primarily for muscle cars, classic trucks, drag racing, and pro-touring builds.

QA1 stands out for its in-house engineering and manufacturing, with most products made in the USA. Their suspension systems are especially popular among enthusiasts looking to modernize older vehicles like Chevelles, Mustangs, and classic GM and Ford trucks. Known for their adjustability and durability, QA1 products are widely respected across both street and track applications.

With a strong reputation for quality and performance, QA1 supports the automotive community through events, sponsorships, and their annual open house. Their accessible performance upgrades have made them a trusted name in the aftermarket suspension world.

Fidanza Performance, founded in 1997, is a leading US manufacturer of high-quality lightweight aluminum flywheels, precision adjustable cam gears, and high-performance clutches. With nearly 20 years in the automotive performance market, Fidanza is renowned for its expertise and respected globally, offering products for a wide range of vehicles, from European sports cars to modern muscle cars and imports. The company originated in racing, with founder Lou Fidanza's success in the SCCA leading to the creation of specialty parts like aluminum flywheels. Fidanza has since expanded its product line to include cam gears and performance clutches, gaining a loyal customer base and worldwide recognition. In 2023 Fidanza opened the SpeedParts4Less Marketplace which sells other manufacturers quality high performance parts!