The Eibach ERS 16.00 in. x 3.00 in. ID Coil-Over Spring (part 1600.300.0300S) is a race coil-over main spring from Eibach's ERS (Eibach Race Spring) line. The manufacturer describes ERS as its most comprehensive race spring system, and its coilover springs are built to motorsport-grade tolerances so the rate and static height stay consistent. The manufacturer also cites maximum travel for a given block height, a light mass, and high linearity as design goals. For a track or autocross build, where damper tuning depends on a predictable spring rate, those tolerances are the main reason to pay for an ERS spring over a generic coil spring or a stock replacement.
This is a 3.00-inch inside diameter spring in a 16-inch length, so confirm that it matches your coilover body's spring seat and perch before ordering. Track-focused buyers searching for a 16 inch coilover spring, 3 inch ID race spring, or linear coilover spring replacement will find it in Eibach's standard ERS range, which lists a 3.00" I.D. option. Rate and finish selection should be verified with the manufacturer because the exact rate for this part number could not be confirmed.
Yes. The manufacturer states that its springs are designed for use with new isolator pads, and worn or thinned pads must be replaced before installation to avoid noise and premature wear.
The manufacturer recommends preloading the suspension before tightening the suspension pivot point bolts. It states that this helps lowering stay consistent and helps pivot bushings last longer.
The manufacturer says Eibach springs are designed to reuse the factory tubing and isolators, which helps prevent noise and premature wear.
Per the manufacturer's install guidance, measure your ride height at the wheel center to the fender arch before removing the old spring so you know how much lowering you gained. Mark all alignment-related mounting bolts for a starting point for alignment, and mark left and right parts before removal. Always use a proper spring compressor when removing a spring or disassembling a strut, because stored spring energy can cause serious injury. The manufacturer offers a professional spring compressor tool that it says is compatible with its springs. Leave a 1/4 to 1/2 inch gap between the end of the coil and the spring seat pocket to reduce noise over large bumps, and route any brake lines and wiring exactly as they were from the factory.
