The Eibach Pro-Kit 3856.140 is a front and rear coil spring set for 1968–1972 GM A-body cars, including the Chevelle, Malibu, Buick Skylark GS, and Oldsmobile 442. It is built around Eibach's progressive-rate lowering spring design, which is meant to lower the stance while keeping stock-style ride quality. Owners on user forums report a noticeably lower, better-planted stance after installation. One owner said the car sat about 2 inches lower and rode better than with the originals. Other owners found the ride firmer than expected and paired the springs with aftermarket shocks such as Bilstein or KYB units, so plan on upgrading dampers if you want the handling gains without a harsh ride. This is a practical choice for a street or weekend-strip A-body looking for a lower center of gravity, a Chevelle lowering spring kit, or a reasonable first step toward a full suspension build.
Before ordering, confirm that your car's year, body style, and rear spring configuration match the application, since published drop figures and fitment notes vary between sources. Installation is a DIY-friendly job for anyone comfortable with coil spring removal and reinstallation, but the seating of the front springs is the step that trips people up. Owners on user forums report that a front spring sitting outside the lower spring pocket can leave the front riding high, so check that the spring's bottom coil is located against the pocket's locating flange with the car raised and good lighting. Searching terms like 3856.140 install, 68-72 Chevelle front spring pocket, and A-body lowering springs will turn up owner walkthroughs.
Published drop figures differ between sources, so the exact amount is not confirmed here. Confirm the front and rear drop with the manufacturer before ordering.
Owners on user forums report that Eibach does not release spring rates to the public. Contact the manufacturer directly if you need rate data for your setup.
Owners on user forums report that front springs not seated correctly in the lower spring pocket cause the front to ride high. Reseating the springs so the bottom coil locates against the pocket flange is the usual fix.
Owners on user forums commonly pair these springs with upgraded shocks, citing Bilstein and KYB as examples. Lowered springs on worn factory dampers can ride harshly and handle less predictably.
Coil spring replacement on these cars requires a spring compressor and a safe lift setup. The most common mistake owners on user forums describe is front springs not seated in the lower pocket, which makes the front sit too high and is easy to miss without a hoist and a good light. Look at the spring pocket in the frame and confirm the locating flange is inside the spring before lowering the car. Also verify the rear springs' pigtail ends match your car before you start, since a mismatched rear spring will not seat correctly.
