The Eibach Pro-Kit 7721.140 is a set of four progressive lowering springs for the 2009-2010 Subaru WRX 2.5L Turbo four- and five-door, excluding the STi. The manufacturer lists a 1.4-inch front and 1.2-inch rear drop for this kit and states it was tested with factory dampers, so you keep your stock struts and avoid the cost of a full coilover setup. Owners on user forums describe a ride that stays close to the factory feel while closing the wheel-well gaps, though some note the rear can look a little low depending on load. It suits a daily driver who wants a sport-package stance and predictable handling without a stiffer, harsher ride. Searchers looking for 2009 2010 WRX non-STi lowering springs, Pro-Kit 7721.140 fitment, or stock-strut lowering springs will find the right kit here.
Fitment and install context matter here. The kit is sold as a complete front and rear set, so you do not need to mix springs from different sources. Eibach's install sheets for other Pro-Kit applications say to reuse the stock spring isolators and dampers, install each spring with the Eibach logo facing up, and check wheel alignment, tire-to-fender clearance, brake line routing, and ABS sensor placement afterward. Confirm the exact procedure for this 2009-2010 application with the manufacturer before starting. Owners on user forums typically find the rear springs easier, often done in about 30 minutes per side with a jack and stands, while the fronts take more time because of the strut and control arm hardware. Plan on a hoist or jack stands, a torque wrench, and a proper alignment after the job.
The manufacturer states the Pro-Kit was tested with factory dampers, so stock struts are the intended pairing for this kit. Owners on user forums who have run them on stock struts report the car stays comfortable, though some prefer upgraded dampers for better control.
No. The manufacturer lists a separate Pro-Kit for the WRX STi under its own part number, 7728.140. This kit, 7721.140, is the version for the non-STi 2.5L WRX.
Details vary. Some owners on user forums report the rear looking a little low or saggy, while others say it sits well. Check the stance after installation and confirm any concerns with the manufacturer.
This is a moderate-difficulty job best suited to someone comfortable with suspension work. Use a hoist if possible, or jack stands placed on solid chassis points, and never work under a car that is not properly supported. The manufacturer's install sheets for other Pro-Kit applications warn against impact tools on shock piston rod nuts, so use hand tools for those fasteners. Owners on user forums recommend hanging the calipers out of the way with wire or zip ties instead of disconnecting the brake lines. Be careful with the springs, since front springs in particular carry a lot of tension when released. Keep the factory isolators and dampers, and finish with a full wheel alignment and a check of fender clearance and brake and ABS line routing.
