D2 Racing Lowering Springs

D2 Racing sells lowering springs under a single line, the PRO Series, rather than splitting them into multiple tiers the way it does with its D2 Racing coilovers. Every PRO Series spring is wound from 55 chrome silicon steel in an ISO 9001 and TUV-approved facility, uses a progressive rate, and carries a lifetime warranty, according to the manufacturer's own product pages. What changes from one application to the next is the drop and the platform it's engineered for.

PRO Series springs are built for owners who want a lower, more planted look and modestly tighter handling without the cost or complexity of a full D2 Racing coilover kit. They're a bolt-on upgrade that reuses the factory shocks and mounting points, so they suit daily-driven Civics, Accords, and Integras, plus RWD sedans like the Chrysler 300 and Dodge Charger, where the owner wants stance over outright track adjustability.

They are not the right pick for anyone who wants ride-height adjustment, corner-weighting, or damping control; that job belongs to coilovers, not springs. See our coilovers vs. lowering springs guide for the tradeoffs.

D2 Racing's PRO Series competes on price against two much older spring brands. Eibach's Pro-Kit and H&R's Sport Springs are both longer-established in the US market and widely cited by tuners for consistent OEM-plus ride quality; D2 Racing is the newer, budget-focused option covering a similar range of progressive-rate, bolt-on applications. Owners researching any of the three should compare the specific drop, spring rate, and warranty terms for their own vehicle rather than assuming one brand's reputation carries over across every fitment, since all three publish per-vehicle specs that vary by platform.

D2 Racing's own product pages describe PRO Series springs as a direct bolt-on using the factory shock and strut mounting points, with no cutting or modification. Because ride height is fixed by the spring's free length, there's no adjustment once installed - if a vehicle sits uneven or lower than the published spec, that's typically a sign the springs need to settle or the dampers aren't matched to the new ride height.

A four-wheel alignment after install is standard practice with any lowering spring, and matching the dampers to the shorter stroke helps keep the ride from feeling harsh. See our lowering springs installation and cost guide for the general process and typical shop pricing.