GM Lower BJ Slug K6117 Style

The GM Lower BJ Slug K6117 Style is a precision spindle checker designed for automotive technicians and suspension specialists who demand accuracy in ball joint inspection and alignment work. Built by ALLSTAR PERFORMANCE, this tool addresses a critical gap in suspension diagnostics—the need for a reliable method to measure taper wear on GM lower ball joints with 2.000 in/ft taper specifications. Whether you're performing routine maintenance or diagnosing steering geometry issues, this slug provides the reference standard necessary for proper spindle assessment.

Manufactured from hardened steel with a black oxide finish, the GM Lower BJ Slug K6117 Style resists corrosion and wear while maintaining dimensional integrity across repeated use cycles. The black oxide coating extends service life in shop environments and provides superior contrast for precise visual inspection. At 0.16 lbs and measuring 4.05 × 1.05 × 7.1 inches, this compact checker fits easily into any technician's toolkit without adding unnecessary bulk, yet delivers the rigid construction required for accurate taper validation on lower control arm assemblies.

Technicians working on General Motors vehicles—particularly those with independent front suspensions—will find this slug indispensable for identifying ball joint degradation before it compromises vehicle handling or alignment. The K6117 profile matches OEM lower ball joint geometry, making it the go-to reference tool for dealership service departments, independent shops, and suspension specialists. Installation is straightforward: position the slug into the spindle bore to assess taper wear and determine if ball joint replacement is necessary. Each unit ships ready for immediate use with no additional setup required.