The Eibach Pro-Kit (part 63115.140) is a four-spring lowering set for the L33 Nissan Altima sedan with the 2.5L or 3.5L engine. The manufacturer designs these progressive-rate springs to lower the car and sharpen handling while keeping ride quality close to stock, and backs the kit with a five-year warranty. The manufacturer also tested the kit with factory dampers, so you can lower the car without replacing the shocks at the same time.
Compared with stock, the Pro-Kit lowers the center of gravity for a more planted feel through corners and on highway on-ramps. Compared with unbranded lowering springs, you get a brand-backed part with a published warranty and a documented Altima application. The manufacturer lists fitment for 2013-2018 Altima Sedans with the 2.5L and 3.5L engines. If your car is a 2013 or 2014, confirm the match with the manufacturer before ordering. Search terms that fit this part include "L33 Altima progressive lowering springs," "2.5L 3.5L Altima lowering kit," and "Eibach 63115.140."
The kit contains two front springs, two rear springs, two front bump stops, and two front dust boots. The manufacturer recommends a hoist, safety stands, and blocked wheels, and advises against impact guns on shock piston components and rod nuts. Keep the stock spring isolators and dampers, and install each spring with the Eibach logo facing up. After installation, check camber, caster, and toe, along with fender clearance, brake line clearance, and ABS sensor clearance. The manufacturer says only experienced suspension mechanics should perform the work.
The manufacturer tested the kit with factory dampers and instructs installers to keep the stock dampers and spring isolators in place.
Yes. The manufacturer's install instructions call for checking wheel alignment, including camber, caster, and toe, along with fender and brake line clearance after installation.
Per the manufacturer's instructions, each spring should be installed with the Eibach logo facing up.
This is a spring-replacement job that involves compressing and removing the stock struts or coil assemblies, so it is more involved than a typical bolt-on. The manufacturer recommends a hoist and warns against impact tools on shock piston and rod nuts, so use a hand torque approach or a spring compressor where needed. Keep the stock isolators and dampers, mark the upper mount orientation before disassembly, and verify the springs and bump stops are seated correctly. Plan on a professional alignment afterward. Owner-reported drop figures for this application were not confirmed in the research, so confirm expected ride height with the manufacturer before buying.
