The Eibach PRO-KIT for the E82 BMW 128i and 135i Coupe is a set of four progressive-rate street lowering springs, front and rear, for the 3.0L inline-six coupe. Eibach says the set lowers the center of gravity, which it links to less squat under acceleration, less body roll in corners, and less nose-dive under braking. Eibach engineers the progressive spring rates to keep the ride livable on daily-driven roads, and owners on user forums describe the result as roughly 25% firmer than stock but still comfortable. Buyers searching for E82 135i lowering springs, 128i progressive-rate springs, or a BMW 1 Series coupe drop kit that keeps factory-style ride quality will find this set aimed at that use.
Check the model year before ordering. The manufacturer lists 2008 to 2013 128i and 135i Coupes (E82), but some published fitment data confirms only 2008 to 2009, so verify against your VIN. The springs are designed around the factory dampers. Owners on user forums report that worn stock shocks can wear faster with these springs, and several have paired the set with upgraded dampers. Plan a four-wheel alignment after installation. Owners disagree on timing: some suggest getting it done about a week after the install, while others wait 60 to 90 days for the car to settle.
The manufacturer lists the 2008 to 2013 BMW 128i and 135i Coupe (E82). Some published fitment data only confirms 2008 to 2009, so confirm your exact model year with the manufacturer or by VIN before ordering.
The springs are designed to work with factory dampers. Owners on user forums report that worn stock shocks can wear faster with lowering springs, and several have installed upgraded dampers alongside the PRO-KIT.
Owners on user forums disagree on timing. Some recommend an alignment about a week after installation, while others wait 60 to 90 days for the suspension to settle before aligning.
This is a spring-compressor job that is much easier on a hoist. The manufacturer's PRO-KIT install guidance recommends a qualified mechanic experienced with spring removal and says a hoist substantially reduces installation time. Keep the stock spring isolators, dampers, and tubing and reuse them with the new springs. On the rear, retorque the bushing pivot points with the vehicle's full weight on the suspension to avoid bushing pre-load. Expect an alignment afterward, and plan for it to be done before you judge the final ride height.
