The Eibach Pro-Kit (part 28111.140) is a four-spring lowering set built on progressive-rate springs for the Challenger R/T 5.7L Hemi V8 and the SRT8 Hemi. The manufacturer tested it with factory dampers, so it lowers the stance without requiring a matching shock or strut swap. Its lower center of gravity is meant to limit body roll and improve turn-in, and owners on user forums describe the ride quality and handling as excellent, which is the main reason to pay more than a budget spring set.
Because the drop is noticeable, check it against your own car before you order. Owners on user forums report that the kit lowers the car more than they expected for a "less aggressive" option, and one owner had to add control arms to restore alignment afterward. If you want a 2011 Challenger R/T lowering spring that keeps daily comfort, a 2012 Challenger SRT8 lowering spring with factory dampers, or a Challenger Nivomat-equipped rear setup, this kit is built for that street-and-track balance.
The manufacturer's application selector lists the 2011–2014 Dodge Challenger R/T and the 2011 and 2012–2014 Dodge Challenger SRT8 for this part number. Confirm your exact trim and engine before ordering.
Owners on user forums report that Nivomat rear dampers limit how far the rear drops, and that the full rear drop requires Eibach's separate damper kit that replaces them.
Drop varies by trim and rear damper type, and the exact figures could not be confirmed directly from the manufacturer during research. Owners on user forums report roughly half an inch in front and over an inch in rear on an SRT, and about 1.75 inches in front with roughly 1 inch in rear on an R/T with Nivomat shocks.
Results vary. One owner on user forums had to add control arms to restore alignment after installation, while another reported no alignment issues after installing the kit.
This is a spring replacement, so the car must be properly supported and the stock springs must be compressed safely with proper spring compressors before removal. Owners on user forums note that the install video says to fasten the shock bolt last, so follow that order. Check your rear dampers before buying, because Nivomat-equipped cars will not reach the full rear drop without the damper kit. After installation, plan an alignment check, since owners on user forums have reported alignment changes after lowering.
