Tarett Engineering – Pro-Series (Rear) Control Arm Kit 981

The ERP Pro-Series lower control arms are a premium, competition-focused suspension upgrade for a wide range of Porsche models, engineered to deliver unmatched strength, precision, and adjustability. Designed and manufactured by ERP Suspension Engineering, this system goes far beyond OEM-style replicas with a true motorsport-grade, no-compromise approach.

Constructed from aerospace-grade 4130 chromoly steel, TIG welded, heat-treated, and finished with electroless nickel plating, these arms are built for exceptional durability and corrosion resistance. A turnbuckle-style design allows for quick and precise adjustment of camber, caster, and wheelbase—eliminating the need for shims entirely.

The system incorporates oversized, precision Teflon-lined rod ends at all chassis pivot points, along with a redesigned, heavy-duty monoball ball joint for increased strength and reliability over traditional 12mm designs. Adjustable diagonal links, inspired by the 997 RSR, allow for fine-tuning of caster, wheelbase, and suspension geometry, including the ability to reduce squat and dive under acceleration.

Additionally, center geometry can be adjusted to maintain proper alignment on lowered vehicles. Each kit is a complete bolt-in solution for one axle, delivering superior performance, strength, and tuning capability for serious track and race applications.