The Eibach Pro-Kit (part 2895.140) is a set of four progressive-rate lowering springs for the Challenger's front MacPherson struts and rear coil springs. It lowers the center of gravity and reduces fender gap while keeping the factory dampers in place. The manufacturer says the kit was tested with factory dampers, and it carries a five-year warranty.
A spring-only kit costs far less than coilovers, and it makes sense for a V6 owner who wants a firmer stance without losing everyday ride comfort. Owners on user forums describe the ride as firmer but livable, with better stability in corners. The stock shocks are the trade-off. Drop height varies by model year and by car, so confirm the expected figure with the manufacturer before you buy. The manufacturer also sells a matching PRO-DAMPER kit (28110.840) for these models if you want to upgrade the dampers later.
The manufacturer states the springs were tested with factory dampers, and its installation instructions say to keep the original spring isolators and dampers. Owners on user forums report that the stock dampers work with this kit.
Yes. The manufacturer's installation instructions call for a wheel alignment, along with checks of fender and tire clearance, brake line clearance, and ABS sensors. Owners on user forums report that some cars could not get front camber back into spec without aftermarket upper control arms.
No. Owners on user forums report that the front struts in the 2895.680 kit do not fit a 2011 Challenger, so the two kits are not interchangeable.
This is a moderate-difficulty job that takes most of a day for a home mechanic. The manufacturer says to mark the orientation of the upper strut perch before disassembly and to reinstall it the same way, because a wrong orientation can cause noise. Owners on user forums mention an electrical clip behind the front fender liner that becomes brittle, a tight rear exhaust bolt on the driver side, and difficulty lining up the inner rear spring bolt. Plan on a spring compressor, a pitman arm puller, and a four-wheel alignment afterward. Owners also note that the springs can lower the car unevenly, so check the final stance after the car has settled.
