Tarett Engineering – Cup-Series Control Arm Kit (Race Spec) 991/981/718 (not GT4 or 991 GT3)

Tarett Engineering’s Cup-Series lower control arms for Porsche 996, 997, 986, 987, 981, and 991 models are a no-compromise upgrade designed to deliver superior strength, precision, and adjustability beyond typical GT3-style replicas.

At the core of the design is a completely re-engineered ball joint system, replacing the common 12mm OEM-style joint with a larger, more robust assembly featuring a replaceable, precision Teflon-lined monoball for improved strength, safety, and reliability. High-misalignment bushings ensure smooth, bind-free operation across all ride heights.

Solid thrust arm bushings and sealed monoball inner ends eliminate the compliance of factory rubber components, resulting in sharper steering response, improved feedback, and enhanced overall handling. These components are CNC-machined from 6061-T6 aluminum and anodized for durability and corrosion resistance, with added adjustability for wheelbase and caster.

Camber and track width are precisely adjustable using GT3-style shims, offering up to 20mm of adjustment per side and up to 2 degrees of additional negative camber. The CAD-designed main housing is optimized for strength and weight, featuring a ribbed design for easier hardware access—addressing a common limitation of OEM and other aftermarket arms.

Engineered for performance and reliability, each kit includes all components needed for one axle and is compatible with a wide range of Porsche applications, with additional options available for specific front fitments.