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QA1 Releases new C5 & C6 Corvette Coil-Overs

December 3, 2021

Lakeville, MN [July 15, 2021]– QA1 is excited to introduce two new coil-over options developed specifically for C5 and C6 Corvettes, including double-adjustable Proma Star shocks and the performance-driven MOD Series shocks.

Both options offer significant advantages over the Corvette’s stock leaf spring suspension:

  • The ability to dial in ride quality with adjustable valving, featuring independent changes to compression and rebound valving
  • Achieve the desired stance while maximizing performance handling characteristics
  • The ability to change springs with relative ease, allowing for precise updates to spring rates instead of relying on leaf springs
  • A greater range of ride-height adjustability for both for base model cars (1” to 2” of drop) and Z06 models (0” to 1” of drop)
  • Enables corner balancing via precise ride height adjustment and removal of transverse leaf

QA1’s coil-overs are easy to install with basic hand tools, use factory mounting locations and do not require the use of a toe link relocation kit. They are available with multiple spring rate options to help enthusiasts find the perfect option for their intended use. The medium spring rates offer great street-ability for cars that will mostly be used on the road. The firm option is geared toward track-oriented cars, further reducing body roll under hard cornering and providing a more planted feel.

QA1 Double-Adjustable Proma Star Coil-Over Shocks

  • The perfect balance of street-ability and performance for drivers who will largely be using their cars on the streets and may occasionally see track time
  • Independent adjustment of compression and rebound shock valving with 18 clicks of adjustment each to dial in each driver’s ideal ride quality for any setting
  • Manufactured in the USA at QA1’s Lakeville, MN facility
  • Eligible for an industry leading limited lifetime warranty – shocks must be registered at prior to installation

QA1 MOD Series Coil-Over Shocks

  • Made for drivers who demand maximum performance from the cars on the track and street
  • Designed to meet the demands of top-tier pro touring and drag racers who require more aggressive force curves
  • Modular valve packs allow you to change valving without removing the shocks from the car
  • Low-speed bleed adjustability to further refine weight transfer and low-speed valving characteristics
  • Nitrogen-charged piggyback canister offers optimal performance while fitting within tight confines of stock suspension geometry
  • Manufactured in the USA at QA1’s Lakeville, MN facility


About QA1

Motivated by the idea that experiences are best made behind the wheel, QA1 manufactures high performance suspension and driveline designed for those who #goDRIVEit.

Founded in 1993, QA1 is an industry leader in performance shocks, suspension components, composite driveshafts, rod ends, spherical bearings and related accessories for the motorsports and industrial markets. QA1 has more than 100,000 square feet of office and manufacturing space in Lakeville, Minnesota. The state-of-the-art facility includes a complete line of CNC machines, hydraulic presses, filament winding and laser cutting equipment that permit all-inclusive shock absorber, suspension component and composite driveshaft manufacturing and assembly operations. QA1’s quality system is certified to the ISO 9001 standard.

For additional information and a free catalog, call 800.721.7761 or visit