Set of 4 springs from Eibach's PRO-KIT line, built for the 991-generation Porsche 911 Turbo and Turbo S. The Eibach E10-72-012-03-22 Pro-Kit replaces the factory springs on AWD coupe and convertible bodies, and the manufacturer lists it for 2014 through 2018 model years. It is a progressive-rate lowering spring, so it lowers the ride height while keeping the factory PASM dampers in use. Search terms buyers use for this part include 991 Turbo S lowering springs, PASM progressive lowering kit, and 911 Turbo AWD coupe lowering springs.
The purchase case rests on the handling geometry and warranty. Lower Center of Gravity and Progressive Spring Design for Excellent Ride Quality are the manufacturer's stated benefits, and a lower center of mass is meant to curb squat under acceleration, lean in corners, and nose-dive under braking. The kit is designed and tested for PASM electronic dampers only, which matters if you are weighing a cheaper non-PASM-tuned spring. Eibach backs the set with a limited lifetime warranty. Actual drop depends on your setup, so confirm the figures with the manufacturer before ordering.
Fitment and install are straightforward for a home mechanic with a few tools. Owners on user forums describe removing the front and rear strut assemblies, compressing the spring, and disconnecting the ABS sensor where it sits tight against the strut. Plan on a wheel alignment after the install, since the lower ride height changes geometry.
The manufacturer states this kit is designed and tested for PASM electronic dampers only, so it is not intended for cars without PASM.
The manufacturer lists the kit for 2014–2018 Porsche 911 Turbo and Turbo S coupe and convertible AWD 991 models. Other sellers list 2014–2017, so confirm your model year with the manufacturer.
The manufacturer describes the product as a set of four springs, so it is a spring-only replacement that works with your existing PASM dampers.
The manufacturer lists a limited lifetime warranty on the Pro-Kit springs.
Owners on user forums report that the job is manageable in a home garage with a spring compressor. Typical steps include removing the strut and spring assembly, compressing the spring to free the old coil, and seating the new spring with the rubber isolator notches aligned in the top hat. Watch for the ABS sensor wire, which can be tight during strut removal. Forum posts also suggest taping the fender before working near the body. Schedule a four-wheel alignment after installation.
