The Eibach Pro-Kit (part 8271.140) is a set of four progressive-rate coil springs, one per corner, designed to lower the car's center of gravity while keeping ride quality close to stock. The manufacturer lists it for the 2003-2008 Toyota Corolla CE, S and LE, and for the 2009 Corolla LE, XLE and S with the 1.8L four-cylinder. For the earlier cars the stated drop is 1.1 inches at the front and 1.1 inches at the rear. Eibach says the springs reduce squat under acceleration, body roll in corners and nose dive under braking, which is the real-world gain over stock suspension.
Compared with a cheap no-name spring, the Pro-Kit's progressive design and Eibach's Million-Mile Warranty against defects and premature failure justify the price for a street car that also sees occasional spirited driving. Eibach states the springs are designed to work with factory dampers, but worn shocks should be inspected or replaced because lowered springs load them differently. Factory mounting hardware is reused, so the install does not require new mounts. Search terms enthusiasts use for this kit include Eibach Pro-Kit 8271.140 Corolla, 2003-2008 Corolla lowering springs, 2009 Corolla 1.8L front and rear drop, and progressive rate coil spring kit.
The manufacturer says to reuse all factory tubing and isolators, which helps prevent noise and premature wear.
The manufacturer states the springs are designed to work with factory dampers. Worn shocks should be inspected, and the manufacturer recommends replacing them with new standard or sport shocks when lowering springs are fitted.
Yes. The manufacturer says to check wheel alignment, tire-to-fender clearance, and brake line clearance after installation, and to recheck ride height after the suspension has settled.
This is a moderate-difficulty job for a driver with basic mechanical skill and a proper spring compressor, which the manufacturer requires for removing springs or disassembling a strut. Before disassembly, mark the position of each component, the left and right side of each part, and the orientation of the upper perch on MacPherson struts so everything goes back in the same order. Measure ride height before you start, drive about ten miles so the springs seat, then measure again to confirm the drop. Preload the suspension before tightening the pivot bolts, and have an alignment done afterward. Owners on user forums report the lower strut bolts are 22 mm and need very high torque, and they often rent the spring compressor rather than buy one.
