The Eibach Pro-Kit for the 2012-2018 Porsche 911 Carrera S RWD (991 generation, part E10-72-012-04-22) is a set of progressive lowering springs. The manufacturer describes PRO-KIT as performance springs meant to lower ride height and improve handling while keeping daily drivability. You keep your factory dampers, so this is a lower-cost step than coilovers. It lowers the center of gravity, which reduces squat under acceleration, body roll in corners, and nose-dive under braking. Owners on user forums say the rear springs feel progressive and that the ride stays composed on the street. Eibach lists this kit for the Carrera S Coupe and Carrera S Convertible, and also for the non-S Carrera Coupe and Convertible. Buyers searching for "991 Carrera S lowering springs," "Eibach Pro-Kit 991 RWD," or "911 Carrera S street handling springs" will find this part matches those needs. If you want a more complete handling package, the manufacturer also offers PRO-DAMPER, ANTI-ROLL KIT, and PRO-SPACER products for the same platform. Installation is a serious weekend job, but it is manageable for an experienced home mechanic. Owners on user forums say you need two jacks, a 19mm or 21mm strut nut socket, and a way to hold the strut while you work. Several owners also report unplugging the PASM connector and an ABS sensor before removing the shock. Rear ride height can be adjusted with a C-clip on the spring perch, so you may need to unload the spring to change its position. Plan for a professional wheel alignment afterward, since the manufacturer's PRO-KIT instructions call for checking camber, caster, and toe.
The manufacturer lists the kit for the 2012-2018 Porsche 911 Carrera S Coupe RWD (991) and for 2012-2018 Carrera Convertible RWD (991) applications on its product page.
Details vary across sources. Owners on user forums have fitted the kit to PASM-equipped 991 cars, but the manufacturer's listing for this part number does not clearly confirm PASM requirements. Confirm with the manufacturer before ordering if your car does not have PASM.
Yes. The manufacturer's PRO-KIT installation guidance calls for checking camber, caster, and toe after the springs are installed, and owners on user forums recommend realigning the car after a lowering spring install.
Rate this as an advanced DIY job. Owners on user forums report needing two jacks, a spring compressor, and a strut nut socket, along with a way to hold the strut steady. Unplug the PASM and ABS sensor connectors before pulling the shock. Check that the foam isolator notches line up with the top hat bolt notches on reinstall, and place the rear spring perch's C-clip at the height you want. The manufacturer advises using safety stands, not impact wrenches, on shock piston rod nuts. Keep the stock isolators, dampers, and tubing where the instructions call for them.
