QA1 HD Pro Rear Triangulated 4-Link Kit - Front Mount Single Adj Coilovers - R173-170

PRODUCT OVERVIEW: QA1's Heavy Duty Pro Rear Triangulated 4-link system simplifies the fabrication process for vehicles lacking aftermarket suspension support. These DIY kits produce professional-quality results and performance in a convenient, easy-to-order package. Designed for the DIY enthusiast, this 4-link system delivers exceptional performance and handling. High-quality, MIG-weldable components ensure a safe and well-engineered design adaptable to various vehicles. Experience convenience, safety, and performance with QA1's HD Pro Rear Triangulated 4-Link. PERFORMANCE This triangulated 4-link design is known for its performance and adjustability, offering a wide range of customization options for enhanced handling on both the street and the track. The adaptable components can be cut to length to accommodate any setup with 40-inch or narrower frame rails. QA1's 5-inch travel Single Adjustable Proma Star shocks complete the kit, providing adjustable performance from the street to the track with ample travel and ride height tuning options. ADAPTABILITY This kit includes all necessary components and hardware for assembling and mounting the trailing arms, shocks, and springs. Designed for versatility, these kits can be cut to length to accommodate most vehicles. The lower trailing arms include an assortment of spacers to easily mount into common leaf spring mounts but can also be adapted into any rear suspension system. Refer to the provided dimensional diagrams and renderings for assistance with your custom installation. KIT CONTENTS: Trailing arm tubes, brackets, rod ends, tube adapters 40 upper trailing arm and shock crossmember All required hardware Single Adjustable Coilover Shocks MADE IN THE USA BEST IN-CLASS LIFETIME WARRANTY Register at QA1.net/warranty for lifetime coverage of your QA1 shocks FITMENT NOTES Welding required Trailing arm tubes can be cut to length Works with 3 in. axle tubes Works on 40 in. and narrower frame rails

​​

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!