QA1 5Q685 Twin Tube Large Body Circle Track Shock 14.3

The QA1 5Q685 is a large body twin-tube steel shock absorber designed for circle track racing applications. Formerly known as part of the 51 and 53 series, the 5Q series features a large body steel construction available in both bearing mount and stock mount configurations. This shock is engineered for GM mid and full-size vehicles and delivers professional-grade performance for serious racers.

Racer-Friendly Design Features:

• Two-piece bodies make it simple to disassemble and reassemble shocks, with a gland featuring relief cuts and hyper screw port for easy filling and bleeding on assembly
• Upgraded seal kit minimizes leaks, especially in high-rebound applications
• Compression tube uses a slip fit design to simplify the rebuild process
• Laser-engraved, black-anodized closure nut makes serial numbers and valving easy to read at the track or in the shop
• Can be re-valved and rebuilt by racers in a matter of minutes using basic tools

Performance Engineering:

• Black zinc coating ensures a very consistent finish, creating a tight seal every time
• Scalloped base loop increases clearances in tight areas like upper control arms and shock mounts
• Pistons are made of high-quality raw aluminum, minimizing variations that can be found in anodized parts
• Valve the shock with bleed shims or drill out bleeds to maximize tunability
• Can be used in coil-over configurations using the appropriate kits (sold separately)

Racers can rebuild and re-valve their own shocks using available tuning and rebuild kits, making the 5Q685 an economical choice for teams looking to maintain consistent performance without expensive rebuilder fees. This shock is manufactured in QA1's Minnesota facility and is ideal for dirt and asphalt circle track racing in modifieds, late models, and super stocks.