The Eibach Pro-Kit 4090.140 is a four-spring lowering set built on Eibach's progressive-rate PRO-KIT design. It replaces the factory springs on the 2013 Honda Accord 2.4L four-cylinder sedan and is meant to work with the stock dampers. The manufacturer advertises roughly 1.0 inch of front drop and 0.7 inch at the rear, which lowers the center of gravity and reduces nose-dive under braking and body roll in corners. Pick this set over a generic lowering spring when you want a modest, factory-style stance with a ride that stays comfortable on a daily commute, since the progressive rate softens at rest and firms up under load.
Owners on user forums report that the kit suits a mild, daily-driven 4-cylinder Accord. They also say an Eibach contact advised that a camber kit is not required on the I4, although a precise alignment afterward is still the right move. The manufacturer's install instructions for PRO-KIT springs say to keep the original isolators and dampers, check caster, camber and toe, verify tire and fender clearance with aftermarket wheels, and mark the upper strut perch orientation before disassembly. Search terms this kit matches include "2013 Accord 2.4L drop springs," "Eibach 4090.140 install," and "Accord I4 progressive lowering springs."
Plan on a half day of work with a hoist or jack stands and a spring compressor. Owners report 2 to 4 hours for a first-timer and note that the front struts need two people, one to hold the clamp and one to compress. Keep the 22 mm lower strut bolts and the rear shelf access in mind, as both are common frustrations. Fitment years vary across sources, so confirm your exact model year and engine with the manufacturer before ordering.
Owners on user forums report that an Eibach representative said a camber kit is not necessary for the four-cylinder Pro-Kit with factory struts. Alignment should still be checked after installation, as the manufacturer recommends.
Yes. The manufacturer's install instructions for PRO-KIT springs say to retain the original spring isolators, dampers and tubing from the stock springs.
This is a moderate-difficulty job for someone comfortable with suspension work. Use a spring compressor, a torque wrench, jack stands or a lift, and the standard socket set including 14 mm and 17 mm sizes. Owners on user forums say the rear is quicker than the front, that greasing the rear mounting bolts helps them stay in the socket, and that pulling the rear shelf clips gives you access to the top nuts. Owners also mention a rear bump-stop trim note in the sedan instructions, so read that step carefully. The manufacturer says to install with the Eibach logo facing up and to recheck alignment and fender clearance when you're done.
