Best 2016-2018 Ford Focus RS Suspension Upgrades Guide

Ford built the 2016–2018 Focus RS to be a giant-killer — 350 horsepower, 350 lb-ft of torque, all-wheel drive and a Drift Mode that made headlines. But the one area almost every RS owner wants to sharpen is the suspension. The right Ford Focus RS suspension upgrade tightens body control, kills the factory fender gap and turns an already brilliant hot hatch into a corner-carving weapon. At NLP Performance in Tampa, FL, the Focus RS suspension category is one of our most-shopped, and this guide breaks down the best lowering springs, sway bars and coilovers for the MK3 RS.

Why Upgrade the Focus RS Suspension?

The MK3 Focus RS left the factory with a genuinely good chassis. Ford gave it a stiffer setup than the Focus ST, two-mode adjustable dampers and a clever rear-drive-unit that can send torque side to side. So why change anything? Two reasons: ride height and body control.

First, the look. The stock RS rides high enough that there is a noticeable gap between the tire and the fender — the classic "4x4 hot hatch" stance. A quality set of lowering springs closes that gap by roughly an inch, drops the center of gravity and instantly makes the car look planted. Second, the dynamics. Lowering the center of gravity reduces weight transfer during cornering, braking and acceleration. Pair that with an upgraded sway bar and you cut body roll, spread cornering loads more evenly across all four tires, and get a car that changes direction with far less drama.

There is also a practical angle our Tampa customers care about: the RS is a daily driver for most owners. The goal is rarely a punishing track-only setup — it is a tighter, better-looking car that still survives Florida expansion joints and parking ramps. Every product in this guide was chosen with that balance in mind.

Lowering Springs vs Coilovers for the Focus RS

Before you spend a dollar, decide which path fits your goals. Lowering springs and coilovers both lower the car, but they solve different problems.

Lowering springs replace only the factory coil springs and reuse your existing dampers. They are the simplest, most affordable way to drop the RS — typically $200 to $400 — and the best Focus RS kits are tuned to work with the factory two-mode dampers and magnetic ride. You get a fixed drop, a fixed spring rate, and a bolt-in install. For 90% of street-driven RS owners, springs are the right answer.

Coilovers replace the entire spring-and-damper assembly with a height-adjustable, often damping-adjustable unit. They cost far more — a quality kit runs $1,500 to $4,700 — but they let you dial in exact ride height, corner-balance the car and tune rebound and compression for track use. If you autocross, run track days, or simply want full control over the setup, coilovers earn their price. If you mostly commute and want a better stance, they are overkill.

Best Lowering Springs for the 2016-2018 Focus RS

These three spring kits are the ones we sell and recommend most for the MK3 RS. All three are progressive-rate designs engineered to retain acceptable ride quality, and all three are confirmed to fit the 2016–2018 Focus RS, including cars with the optional magnetic-ride dampers.

1. Whiteline Performance Lowering Springs — Best Overall

The Whiteline kit is our top pick because it nails the balance every RS owner wants. The 25mm drop is even front and rear, so the car keeps a level, aggressive stance rather than a nose-down or tail-high look. Whiteline's combination of linear and progressive rate coils means the first part of suspension travel stays compliant for bumps and broken pavement, while the rate builds under hard cornering to control roll. At $229.29 it is also the most affordable kit here, with a manufacturer warranty backing it. For a street-driven RS that still sees the occasional canyon road or autocross, this is the smartest money you can spend.

2. Eibach Pro-Kit — Best for Magnetic Ride

Eibach's Pro-Kit is the most recognized name in lowering springs, and the Focus RS version is specifically tested with the factory dampers, including the magnetic-ride hardware. That validation matters: a spring that fights the adaptive damper logic can make the ride worse, not better. The Pro-Kit delivers a slightly milder, more progressive drop than the Whiteline kit, which keeps the ride exceptionally civil for a daily commute while still tightening body control and trimming the fender gap. Eibach's reputation, fitment testing and finish quality are why it commands the highest price of the three spring kits — and why owners who prioritize comfort gravitate to it.

3. H&R Sport Springs — Best for an Aggressive Drop

H&R Sport Springs are the brand's number-one selling product for a reason: they deliver a confident, aggressive drop with a progressive rate that still rides well. On the RS, the Sport Spring set reduces fender-well gap noticeably and lowers the center of gravity for reduced body roll and sharper handling. H&R also backs the springs with a limited lifetime warranty. If your priority is the most aggressive street stance of the three kits while keeping a bolt-on, factory-damper-friendly install, the H&R set is the one to grab.

Focus RS Lowering Spring Comparison

Best Sway Bars for the Focus RS

If lowering springs are the highest-value upgrade, an adjustable sway bar is the highest-impact one for handling feel. Sway bars do not lower the car — they directly attack body roll. By tying the left and right wheels together more firmly, a bigger bar spreads lateral load across the tires and sharpens turn-in. The magic word for the RS is "adjustable": multiple end-link mounting holes let you tune understeer or oversteer balance without changing parts.

Whiteline's 26mm front bar is engineered to "activate more grip" by cutting body roll, and its three adjustment positions let you fine-tune how much the front end bites. Set it soft for a balanced street feel, or stiffen it for sharper, flatter cornering on a back road. Whiteline pairs the front bar with a matching 22mm rear 2-point adjustable sway bar — running both lets you tune the front-to-rear balance precisely, dialing out the RS's mild factory understeer. For owners who want the biggest handling change for the lowest spend, a front bar is the single best $230 you can spend on this car.

Best Coilovers for the Focus RS

When springs and bars are not enough — when you want adjustable ride height, corner balancing and tunable damping — coilovers are the answer. For the Focus RS, the benchmark is the KW Variant 3.

The KW V3 is German-made motorsport hardware adapted for the road. It gives you independent rebound and compression damping adjustment plus continuous ride-height adjustment, so you can corner-balance the car and set it exactly where you want it. The trade-off is price and complexity: at $3,584 it costs more than ten times a set of springs, and dialing it in rewards owners who understand suspension tuning. If you track the RS or autocross seriously, the V3 is worth every dollar. If you just want a better street car, the Whiteline springs and a sway bar will get you most of the way there for a fraction of the cost. Note that RS cars equipped with magnetic ride may need KW's electronic damping cancellation module to suppress dash warnings — confirm your setup before ordering.

How These Upgrades Affect Daily Driving

Honest expectations matter. Lowering springs in the 25mm range — like our top-pick Whiteline kit — firm the ride up noticeably but stay daily-usable. You will feel sharper transitions and a flatter cornering attitude, and pavement seams transmit a bit more into the cabin. For most owners that is a fair trade for the improved stance and body control.

A sway bar barely affects straight-line ride comfort at all — it only loads up during cornering — which is why it is such an efficient upgrade. The biggest practical consideration with any drop is ground clearance. A lowered RS is more likely to scrape steep driveways, speed bumps and parking blocks, so approach inclines at an angle. After installing springs you should also budget for a four-wheel alignment; lowering changes camber and toe, and skipping the alignment leads to uneven, accelerated tire wear.

Installation Tips and What Else You'll Need

Lowering springs on the Focus RS are a bolt-in job for an experienced DIYer, but they require spring compressors and the ability to safely service strut assemblies. Plan on a few hours, work one corner at a time, and torque every fastener to spec. A few pointers from our Tampa shop:

Inspect while you're in there. Strut mounts, bump stops and end links are easiest to replace with the suspension apart — tired bump stops can ruin a fresh spring's ride. Plan the alignment. Book a four-wheel alignment immediately after install; a lowered RS often needs camber correction to keep tire wear even. Consider wheel fitment. A lower car shrinks fender clearance, so if you run wider wheels or want to fine-tune track width, Eibach Pro-Spacers help dial in the stance. Sway bars are simpler. A front bar is one of the easier bolt-ons here and usually does not require an alignment afterward.