Koni has built the world's most respected adjustable shock absorbers for over 60 years out of Oud-Beijerland, Netherlands — the same hydraulic engineering that wins Le Mans, the Dakar Rally, and IndyCar trickles directly into the yellow shock bolted to your daily driver. At Springrates we stock the complete Koni street catalog: Sport Yellow adjustable shocks, STR.T direct-replacement dampers, Special Active FSD shocks, Heavy Track and Raid for trucks and overlanders, the new GTS Coil-Over Kit, and full bolt-on Sport Kits and STR.T Kits that pair Koni dampers with Eibach Pro-Kit lowering springs.
Every Koni street shock is rebuildable, revalvable, and backed by Koni's lifetime workmanship warranty — you buy this once for the life of the car. Whether you're a BMW E46 owner chasing sharper turn-in, an S550 Mustang driver building for the track, a JK Wrangler runner who lives off-pavement, or a daily-driven Civic looking for the best handling-per-dollar upgrade on the planet, the right Koni part is in this collection.
Shop Koni by Product Line
- Koni Sport (Yellow Adjustable): Externally adjustable rebound damping for street and track. The benchmark enthusiast shock since 1968.
- Koni STR.T: Fixed-valve street shocks slightly firmer than OE. Direct bolt-on with stock or mild lowering springs.
- Koni Special Active (FSD): Frequency Selective Damping — soft on bumps, firm in corners, zero adjustment required.
- Koni Sport Kit: Four Sport Yellow shocks + Eibach Pro-Kit lowering springs in one box. The most-recommended single suspension upgrade in the Koni catalog.
- Koni STR.T Kit: Four STR.T shocks + Eibach Pro-Kit lowering springs — 25-35 mm drop and tighter handling with a long-life street tune.
- Koni Special Active Kit: FSD shocks + Eibach Pro-Kit lowering springs — the smartest plug-and-play street-performance package.
- Koni GTS Coil-Over Kit: Threaded-body monotube coilover with adjustable rebound and ride height. Koni's flagship street-and-track system.
- Koni FSD & FSD/Eibach Kits: Frequency Selective Damping in a complete kit for stock-height or lowered builds.
- Koni Heavy Track & Raid: Internally adjustable and frequency-sensitive shocks engineered for trucks, SUVs, overlanding rigs, and lifted 4x4 builds.
- Koni Race & 28 Series: Short-body race-valved dampers for autocross, trackday, and road-race builds (race product — no warranty).
Why Buy Koni from Springrates
- Authorized Koni dealer with fitment specialists on staff — chat or call before you order to confirm the right SKU for your build.
- Free U.S. shipping on Koni orders over $250.
- Best-price MAP guarantee — we sell at Koni's authorized MAP, with the option to bundle with Eibach springs, sway bars, or top mounts for additional discounts at checkout.
- In-house Koni install knowledge for the most-asked platforms: BMW E36/E46/E90/F30, S197 / S550 / S650 Mustang, FK8 / FL5 Civic Type R, ZN6 / ZN8 86/BRZ, NA/NB/NC/ND Miata, MK4-MK8 Golf/GTI, B6-B9 Audi A4, and more.
- Direct manufacturer warranty handling — if a Koni street shock ever fails on workmanship, we file the claim, you don't.
Frequently Asked Questions
What's the difference between Koni Sport Yellow and Koni STR.T?
The Sport Yellow is Koni's externally adjustable shock — you turn a knob on the shock body to dial rebound damping from soft daily-driver to firm trackday. STR.T is a non-adjustable fixed-valve damper tuned slightly firmer than OE. If you want to tune the car, buy Sport Yellow. If you want a bolt-on improvement and never touch it again, buy STR.T.
Will Koni shocks work with lowering springs?
Yes — Koni Sport, STR.T, and Special Active are explicitly designed to work with factory springs OR aftermarket lowering springs up to roughly 35 mm of drop. For deeper drops, use a coilover kit (GTS or 1150 series) or pair with shorter springs and a Koni Race damper.
What is Koni FSD (Frequency Selective Damping)?
FSD is Koni's patented hydraulic valving that gives one shock two damping curves — soft for low-frequency road inputs like pavement joints (comfort) and firm for high-frequency body inputs like corners and braking (control). It self-adjusts based on the input frequency, so there's nothing to tune and nothing to wear out.
Are Koni shocks rebuildable?
Koni street shocks (Sport, STR.T, Special, Special Active, Coil-Over, GTS) are rebuildable and revalvable through Koni's North American service center. Race shocks (8041 RACE, 28 Series) ship as racing products without warranty.
How long does Koni shipping take?
Most Koni stock SKUs ship same- or next-day from Springrates. Special-order Koni parts (marked in the product listing) typically take 2-4 weeks from the Netherlands factory. Discontinued items show real-time inventory; once stock runs out, those listings are closed.
Does Koni have a lifetime warranty?
Yes — every Koni street product carries a lifetime warranty on workmanship. We handle warranty claims directly with Koni North America on your behalf.
Shop the complete Koni catalog below by vehicle, product line, or part number. Filter by year, make, and model to find your exact fitment.