2015-2021 WRX STI Coilovers: KW vs Ohlins vs Bilstein

The best 2015-2021 Subaru WRX/STI coilovers for most drivers are the KW Variant 3 (V3), which pair independently adjustable rebound and compression damping with KW's TUV-tested stainless "inox-line" build. But the VA chassis is one of the most coilover-rich platforms on the market, and the right kit depends on whether you daily-drive, autocross, or chase track times. In this comparison we put six of the most popular VA WRX and STI coilover systems head to head — KW V3, Ohlins Road & Track, Bilstein B16 PSS10, KW V1, ST XTA, and BLOX Plus Series — spanning $891 to $3,894, so you can match damping, ride height, and top-mount hardware to how you actually drive.

Why upgrade the coilovers on a 2015-2021 WRX/STI?

Upgrading coilovers on a VA-chassis WRX or STI unlocks handling that Subaru deliberately softened for daily comfort. The 2015-2021 STI runs the STI-tuned EJ257 2.5L turbo boxer making 305 hp (310 hp on 2019-2021 cars) and 290 lb-ft, backed by a 6-speed manual, the DCCD center differential, and factory Brembo brakes. The 2015-2021 WRX uses the FA20 2.0L turbo at 268 hp and 258 lb-ft. Both cars weigh roughly 3,300-3,400 lb, and both leave the factory with tall ride height, soft springs, and noticeable body roll.

A quality coilover kit fixes three things at once: it lowers the center of gravity, adds spring and damper rate to control roll and squat, and — on adjustable kits — lets you tune the balance for grip. On a symmetrical-AWD car that puts power down through all four corners, reducing body roll and keeping the tires planted is where lap time and steering response come from. Below we compare all six kits, then break down each one.

What to look for in WRX/STI coilovers

Four things separate a great WRX/STI coilover from a harsh, disappointing one: damper design, adjustability, top-mount hardware, and build quality. Understanding them makes the comparison below easy to read.

Monotube vs. twin-tube: Every kit in this comparison uses a monotube damper, which separates oil and gas for more consistent damping under repeated hard use — exactly what a track-driven Subaru needs. Damping adjustment is where these kits diverge most. Fixed-damping kits like the KW V1 are tuned once by the manufacturer; single-adjustable kits (ST XTA, Ohlins) let you change rebound or overall firmness; and 2-way kits like the KW V3 separate rebound from compression so you can add cornering grip without harshening the ride. More clicks are not automatically better — the BLOX Plus Series offers 32-way adjustment, but valving quality still decides how the car actually feels.

Top mounts and camber: Kits with camber-adjustable top mounts (ST XTA, BLOX) let you dial in negative front camber for grip and even tire wear at the alignment rack, while kits that reuse the OE rubber mounts (KW V1, KW V3, Bilstein) ride quieter but need aftermarket camber plates for aggressive setups. Finally, build quality and warranty matter on a car that sees salt and rain: KW's stainless "inox-line" bodies and Bilstein's zinc-coated threads resist the seized collars that plague cheap coilovers. Match these four traits to your driving and the right kit becomes obvious.

2015-2021 WRX/STI coilover comparison chart

Here is how the six kits stack up on the three specs that decide the buy: damping adjustment, front top-mount hardware, and intended use. Prices are current NLP Performance pricing at the time of writing.

KW Variant 3 (V3): the best all-around VA WRX/STI coilover

The KW V3 is the coilover to buy if you want one kit that does everything. It is the only kit here with true 2-way independent damping in this price bracket: 16 clicks of rebound to trade comfort for body control, and a separate 12-click low-speed compression bottom valve that lets you dial out dive and squat without changing spring rate. That means you can set a plush freeway ride on Monday and firm compression for a track day on Saturday, from the same hardware. KW builds the V3 from its "inox-line" stainless-steel strut housings, which are rustproof for the life of the car, and the range is TUV-tested for road use.

Ohlins Road & Track: the track-day specialist

The Ohlins Road & Track is the pick when lap times matter most. It uses Ohlins' DFV (Dual Flow Valve) technology in an inverted 46mm monotube damper, giving a consistent damping curve on both compression and rebound. Adjustment is a single golden knob with 20 clicks that simultaneously alters low- and high-speed compression and rebound — turn it clockwise on arrival at the track for "race mode," then back off for the drive home. Spring rates and valving are specific to the GR/GV/VA Subaru chassis, so it rides better on the street than its track credentials suggest.

Bilstein B16 PSS10: refined street and canyon comfort

The Bilstein B16 PSS10 is the choice for drivers who want a firmer, more planted street car without giving up ride quality. It uses Bilstein's monotube gas dampers with a threaded, zinc-coated body and 10 stages of combined compression-and-rebound adjustment. The adjusters are numbered at the base of each shock, so you always know your setting without counting clicks. Ride height is adjustable roughly 1.0 in to 1.75 in lower (about 30-50 mm) front and rear, and Bilstein includes the ride-height wrenches in the box.

KW Variant 1: set-and-forget quality on a budget

The KW Variant 1 is the entry point into KW quality and the smart pick if you want KW's build and ride-height control without paying for adjustable damping. The V1 uses the same stainless inox-line housings as the V3, but the dampers are factory pre-set by KW's engineers — no knobs to fiddle with. Lowering is independently adjustable, roughly 0.6 in to 1.4 in in front and 0.2 in to 1.4 in in the rear. For a daily-driven WRX or STI where you want a balanced, engineered ride and a clean stance, the V1 delivers most of the KW experience for about $1,480 less than the V3.

ST XTA: the value pick with camber-adjustable top mounts

The ST XTA is the best value coilover here and the only sub-$1,700 kit that ships with camber-adjustable top mounts. ST is KW's value-focused sub-brand, and the XTA uses KW damping technology in a galvanized, extra-corrosion-resistant body. You get 16 clicks of rebound adjustment plus aluminum uniball camber-adjustable top mounts — hardware that usually costs extra on premium kits — making it a genuine autocross and track-day bargain. Note that this specific NLP listing is cataloged for 2015-2017 WRX/STI; 2018-2021 owners should confirm fitment before ordering.

BLOX Plus Series: most adjustment for the money

The BLOX Plus Series is the budget-adjustability champion, offering 32-way damping adjustment at under $900. It runs a monotube threaded body for full ride-height adjustability at each corner, application-specific SAE 9254 heat-treated and shot-peened springs, and pillow-ball upper mounts with billet camber plates where applicable. It won't match the ride refinement or valving consistency of KW, Ohlins, or Bilstein, but for a stance-and-street build or a first coilover on a budget, it packs the widest adjustment range of any kit here.

Which WRX/STI coilover should you buy?

Buy the KW V3 if you want one kit that does street and track without compromise — its independent 16-click rebound and 12-click compression adjustment is the most versatile setup here. Choose the Ohlins Road & Track if your VA lives at track days and you value the DFV damper's race pedigree. Pick the Bilstein B16 PSS10 for the most refined firm-but-comfortable street ride, the KW V1 for engineered set-and-forget quality, the ST XTA for the best value with camber plates included, and the BLOX Plus Series when you want the most adjustment for the least money. All six are in stock and ship from NLP Performance in Tampa, FL. Compare the full range in our coilovers collection and suspension collection.