The Eibach Pro-Kit is a progressive-rate coil spring set for the B8 Audi A4 2.0L sedan, built to lower the car while keeping daily ride quality reasonable. Listings put the drop at approximately 1.4 in front and 1.2 in rear. Compared with a bargain spring set, the Pro-Kit is meant to lower the center of gravity, which reduces body roll and nose dive, and the manufacturer describes a powder-coated finish for corrosion resistance. Owners on user forums say stock shocks often cannot control the firmer spring rate, so many pair these springs with a sport damper such as a Bilstein B8.
Fitment needs a careful check. Listings cover 2009 through 2016 B8 and B8.5 A4 sedans, although the product title reads 09-15. Drivetrain coverage conflicts across sources. Some listings describe front-wheel-drive only, and Eibach's European listing for a sibling Pro-Kit excludes 4WD vehicles, so confirm your quattro status and axle load ratings with the manufacturer before ordering. The manufacturer also recommends checking wheel alignment after installation, and it advises preloading the suspension before torquing pivot bolts, measuring ride height before and after, and driving about ten miles so the springs settle. Search terms buyers use include B8 A4 2.0T lowering springs, B8.5 A4 sedan Pro-Kit, and Eibach 15105.140 install.
The manufacturer states the Pro-Kit is designed to work with OE shock absorbers, but the existing dampers should be checked for wear and replaced when needed. For a firmer, more controlled ride, the manufacturer recommends sport shock absorbers, citing the Bilstein B8 as an example.
Fitment for all-wheel-drive models varies between sources. The manufacturer's European listing for a related Pro-Kit excludes vehicles with 4WD, so confirm compatibility with the manufacturer before purchase.
Yes. The manufacturer states that checking wheel alignment is required after the springs are installed.
This is an intermediate-to-advanced job because the springs must be installed under load and the struts or suspension components must be compressed safely. The manufacturer recommends installing the springs with qualified personnel and the special tools needed, so a DIYer should use proper spring compressors and jack stands. Before disassembly, note the routing of brake lines, wiring, and cables, because incorrect reinstallation can damage them. Measure ride height from the wheel center to the fender arch before and after, and remember that the manufacturer says to preload the suspension and tighten pivot bolts with the vehicle weight on the tires, then drive about ten miles before measuring the final height. Plan on an alignment afterward.
