D2 Racing Coilovers

D2 Racing sells coilovers directly through its own US site under two series names: RS and SL. Both share the same core hardware - a 36-way damping-adjustable monotube shock with a pillowball front mount and anodized, powder-coated mounts with anti-rust coating on the strut threads - but they are tuned for different goals.

RS is D2 Racing's standard coilover, built for a modified street car that also sees occasional track days, with separate height and preload adjustment so the car can be lowered without losing usable strut stroke. SL (Super Low) reuses the same monotube platform but swaps in shorter-stroke shock bodies and custom spring rates, letting the car sit up to 2 inches lower than an RS kit on the same chassis. D2 Racing also lists RS kits with front air cup add-ons (Silver/Gold control systems) that lift the front of the car on demand, but those are an accessory on top of RS, not a separate suspension series.

*RS and SL prices are from individual D2 Racing product pages at the time of writing and vary by vehicle application; see coilover brands for how this fits against the rest of the lineup we track.

RS is the series D2 Racing builds for most applications: a lowered stance with 36 damping settings to tune ride feel, enough adjustment range to still see a track day without running out of suspension travel. It is the right starting point for most street builds.

SL exists for one job - getting a specific chassis, like an older Honda Civic or Acura Integra, as low as the fender gap allows. D2 Racing markets it as lowering the car up to 2 inches more than the equivalent RS kit on the same platform, at the cost of some of the stroke and bump-clearance margin RS keeps in reserve.

RS kits with front air cups split the difference for owners who want the slammed SL-style stance for shows but need to raise the front on demand for speed bumps or steep driveways.

D2 Racing sits in the same budget-to-mid-range bracket as BC Racing, Godspeed, and Megan Racing rather than against shock specialists like KW. Where BC Racing's BR line and Megan Racing's Street Series lead with 32-way damping, D2 Racing's RS and SL kits both run 36-way adjustment as the baseline across the lineup. D2 Racing's SL Series is a more direct point of comparison with low-stance-focused kits elsewhere in this bracket, since it is built specifically to out-drop a standard street coilover on the same chassis rather than just adding adjustability.

D2 Racing RS and SL kits separate ride height adjustment from spring preload, so height can be set at the lower mount with a coilover spanner wrench without changing how much the spring is compressed; see our general coilover installation and cost guide for the shop-labor side of the job. Damping is adjusted from a single knob with 36 click positions - for what changing that setting actually does to ride and handling, see how to adjust coilovers. Because the front mount is a pillowball rather than a rubber bushing, a camber-correcting alignment is part of the install on both series, not an optional extra.