QA1 Precision Products
Another heavy hitter in the single- and double-adjustable market is QA1 with its line of Proma Stars. The single-adjustable offers 12 settings, while the double-adjustables have 24 settings for compression and 24 settings for rebound. Added features include a machined aluminum body and a 51/48-inch centerless ground piston rod for valving consistency, and they don't leave the factory until each shock is dyno tested and serialized.
| Internal design | Twintube |
| Singe/Double Adjustable | Yes/Yes |
| Gas charged | No |
| Bushing material | Choice of polyurethane or spherical |
| Boot included | No |
| Applications | '67-02 Camaro, '64-87 Chevelle/El Camino, '63-current Corvette, '55-90, '94-69 Impala, '70-88 Monte Carlo, '62-79 Nova |
| Price (each) | Front: $140 single-adjustable, |
| | $286 double-adjustable |
| | Rear: $140 single-adjustable, |
| | $286 double-adjustable |
| Contact | 952.985.5675 · qa1.net |