Tarett Engineering – Cup-Series Control Arm Kit (GT3 Rubber Spec) Front or Rear 981GT4, 718 GT4, 991 GT3, & 991 GT2

Introducing Tarett Engineering’s GT3 Spec Cup-Series lower control arms for Porsche 996, 997, 986, 987, 981, and 991 models. Now certified by PCA and POC, these arms serve as a class-legal replacement for the discontinued OEM 996 GT3 control arms—delivering factory-correct geometry with significantly enhanced strength and precision.

Engineered beyond typical billet replicas, this design features a completely reworked ball joint system that replaces the common 12mm configuration with a larger, more robust assembly. The result is a safer, more durable solution utilizing a replaceable, oversized Teflon-lined monoball, paired with high-misalignment bushings for smooth, bind-free operation at any ride height.

Maintaining GT3-spec compliance, the arms utilize rubber thrust arm bushings and inner ends, along with dual mounting points for caster adjustment—ideal for high camber setups. Camber and track width are adjusted using proven GT3-style shims, allowing up to 20mm of adjustment per side and up to 2 degrees of additional negative camber.

CNC-machined from 6061-T6 aluminum and finished with a durable anodized coating, the arms are optimized for strength, weight savings, and corrosion resistance. A unique ribbed design improves access to inner hardware, solving a common limitation found in OEM and other aftermarket options.

Each kit includes all components required for one axle and delivers a no-compromise solution for drivers seeking class-legal performance, reliability, and precision.