QA1 Motorsports

QA1 offers the adjustable shocks for a variety of applications, including stock suspensions for 1955 – present American cars and light trucks, front coil-over conversions for GM muscle cars, as well as four-link and ladder bar type suspensions. The double adjustable shocks are available in the Proma Star®, Stocker Star®, Pro Coil,
Corvette “C”, Generation "F", Pro Street and Mustang Rear series.

• Deflective Disc Valving – Advanced Shock Technology
Increased sensitivity in valving response, control and consistency.
• Precision Machined Piston with P.T.F.E. Piston Band
Creates accurate piston to cylinder wall seal, improves valving consistency and increases durability.
• 5/8” Centerless Ground, Hard Chrome Plated, Solid Piston Rod
Precision surface eliminates piston rod flex, increasing valving consistency.
• Machined Aluminum Body
Bright anodized for unmatched durability and great appearance.
• Three Step Sealing System
Advanced aerospace material, exclusive double lip seal design and wiper seal eliminate seal drag and dirt intrusion.
• 100% Dyno Tested and Serialized
Assures consistency in production and performance.
• Shock Mounting Hardware
Exclusive Teflon®/Kevlar® race bearings for smooth, bind-free operation. Also available with polyurethane bushings.
• Spring Mounting Hardware Included
Aluminum spring cap, spring seat, spring seat washer and locking ring included.
• These shocks are revalveable and rebuildable by QA1 Authorized Service Centers

How many adjustments do QA1 shocks have?
QA1 single adjustable shocks have twelve clicks of adjustment and Mustang struts have ten full turns of adjustment. The new double adjustable shocks have twenty-four clicks of independent rebound adjustment and twenty-four clicks of independent compression
adjustment - allowing for 576 valving combinations!
How do I adjust the ride quality of my shocks?
Simply by turning the knob(s) located near the bottom of the shock.
Are QA1 drag racing and street performance shocks rebuildable?
Yes. You can have one of our authorized service centers rebuild them.
What does QA1 offer for Mustang II suspensions?
QA1 offers two Mustang II front end coil-over conversion systems, as well as a non-coil-over adjustable stock replacement shock. Both front end coil-over conversion systems include (2) adjustable or non-adjustable shocks, (2) specially designed chrome plated conical springs, and mounting hardware. The adjustable shocks are available in bright anodized or polished aluminum, and the non-adjustable shocks are chrome plated steel. See pages 60 or 74 for more information.
I want to put coil-overs on the front end of my GM muscle car. Does QA1 offer anything for me?
Yes, QA1 offers several variations of its Pro Coil System, engineered specifically for GM muscle cars. The Pro Coil and “R” Series Pro Coil Systems include (2) single adjustable shocks, (2) specially designed conical springs, and mounting hardware. The Pro Coil System is also now available with double adjustable shocks. The Economy Pro Coil
System consists of (2) non-adjustable shocks, (2) specially designed conical springs, and mounting hardware. Each system is offered for both big block and small block cars. The “R” Series Pro Coil System is designed exclusively for drag racing applications – with a fixed firm compression and twelve positions of rebound adjustment, you’ll have
unmatched performance at the track.
I am running exactly the same set-up as the track champion. I have driven his car and it is much faster than mine. What’s wrong with my car?
It is quite possible that there is nothing actually wrong with your car. Building two cars exactly alike does not happen very often. There can be variances in chassis rigidity that make each car react differently to the same set-up. For instance, a chassis with a lot of flex in it may need more spring rate to compensate for the flex in the chassis. There can
also be minor differences in geometry that you may not have thought about. You may be running a different wheel and tire combination, or the spring and shock mounts may be at different locations. You will need to keep experimenting with your set-up to find the right
combination for your car.