Best Acura NSX (NA1) Coilovers: KW V3 vs V5 vs Tein

Choosing Acura NSX (NA1) coilovers is a balancing act between preserving what made Honda’s aluminum supercar special and unlocking the body control its 270-horsepower chassis always deserved. A coilover kit for the first-generation NSX is a matched spring-and-damper suspension system — usually with adjustable ride height and adjustable damping — that replaces the factory nitrogen gas coil-overs to sharpen handling, dial in stance, and let you tune the car for street, canyon, or track. In this comparison we put the four suspension upgrades we stock for the 1990–2005 NSX head-to-head: the flagship KW V5 ($6,594.00), the enthusiast-favorite KW V3 ($3,734.00), the value-leading Tein Flex Z ($908.60), and the OE-height Bilstein B8 monotube damper ($221.00 per corner).

Why the First-Gen NSX Needs a Suspension Upgrade

The NA1 Acura NSX was engineering ahead of its time, and three decades later that same chassis rewards a modern coilover more than almost any car we work on in Tampa. When it launched in 1990, the NSX was the first mass-produced car with an all-aluminum monocoque body, and it paired that lightweight structure with forged-aluminum double-wishbone suspension at all four corners — upper and lower control arms, a front compliance pivot, anti-roll bars, and nitrogen gas-filled coil-over shocks. Curb weight was just around 3,010 lbs, and the mid-mounted C30A 3.0-liter V6 spun to 8,000 rpm producing 270 hp at 7,300 rpm and 210 lb-ft of torque. From 1997, the C32B 3.2-liter V6 bumped output to 290 hp.

The factory setup was deliberately compliant — Honda benchmarked the NSX to be usable daily, so the OE dampers are soft and non-adjustable. That was brilliant in 1991. But most surviving NA1 cars are now running 20-to-35-year-old dampers and bushings that have long since lost their gas charge and control. A modern coilover restores composure, kills the float over crests, adds adjustable ride height to correct the NSX’s slightly tall factory stance, and — on the adjustable kits — lets you separate a plush street tune from a stiff track setup. Because the NSX uses true double wishbones, it responds beautifully to a properly valved coilover: camber curves stay honest and the contact patch stays planted.

Acura NSX (NA1) Coilovers Compared at a Glance

Here is how the four NA1 NSX suspension options stack up on the specs that actually decide your purchase — damping adjustability, ride-height adjustment, and intended use. Prices are current at NLP Performance.

KW V5 Coilover Kit — The Track-Ready Flagship

The KW V5 is the most advanced street coilover KW builds for the NA1 NSX, and it is our top pick for owners who want one suspension that does everything. It offers 4-way adjustability — you independently tune compression and rebound in both the low-speed and high-speed ranges, with 14 precise clicks per circuit. That means you can soften the low-speed compression for a compliant ride over Florida’s expansion joints while keeping high-speed compression firm to control big hits at a track day. The headline feature is KW’s Solid Piston technology, which reacts without the dead-spot lag of a floating piston, so the damper responds instantly to small steering inputs, braking, and road undulations — exactly what a light, mid-engine chassis wants.

KW V3 Coilover Kit — The Enthusiast Benchmark

The KW V3 is the coilover most NSX owners actually buy, and for good reason: at $3,734.00 it delivers the meaningful part of the V5’s capability for roughly half the money. The V3 gives you independent 2-way damping — 16 clicks of rebound and 12 clicks of compression, adjusted separately — using KW’s patented TVR-A and TVC-A twin-valve technology. Rebound controls how quickly the wheel returns after a bump; compression controls how the wheel absorbs the hit. Separating them lets you balance the car’s handling far more precisely than a single-adjustment coilover. The V3’s stainless-steel “inox-line” body resists corrosion, which matters on a car this valuable, and ride height is fully adjustable so you can set an honest, corner-balanced drop.

Tein Flex Z Coilover Kit — Best Value Full Coilover

If you want a real, height-and-damping-adjustable coilover for your NSX without a four-figure spend, the Tein Flex Z at $908.60 is the value champion of this comparison. It uses 16-way damping adjustment through Tein’s ADVANCE NEEDLE valving, where a single knob simultaneously adjusts bump and rebound — simpler than KW’s independent circuits, but plenty of range for a street car. The Flex Z pairs a twin-tube damper with linear damping for a supple low-speed ride that firms up as pace rises, and it ships with vehicle-specific upper mounts. It is also EDFC-ready: add Tein’s electronic damping controller and the 16 levels expand to 32 or 64, adjustable from the cabin or automatically by speed and G-force. Built in Yokohama, the Flex Z uses sealed, non-rebuildable dampers to keep the price down.

Bilstein B8 Dampers — The Budget OE-Height Refresh

Not every NSX owner wants a coilover. If your car still rides on tired factory-height dampers and you want to restore control without changing stance, the Bilstein B8 46 mm monotube is the honest budget answer at $221.00 per corner. The B8 is a fixed-valve, gas-pressure monotube built to application-specific performance valving — firmer than OE, with a dividing piston that lets the oil expand as heat builds so damping never fades. It is engineered to work with OE or aftermarket lowering/sport springs: the shortened body carries the correct preload for a mild drop. There is no ride-height or damping adjustment, so it is not a coilover — but as a straight damper upgrade it sharpens the NSX meaningfully for a fraction of the cost. Remember you need four (two front, two rear).

How to Choose the Right NA1 NSX Suspension

Match the kit to how you actually use the car. If your NSX sees track days or you want one setup that swaps from comfortable cruiser to canyon weapon by turning a few clicks, buy the KW V5 — the 4-way adjustability and Solid Piston damper are worth it. If you drive spiritedly on the street and want proven KW quality without the flagship price, the KW V3 is the benchmark and the kit we fit most often. If you want a genuine adjustable coilover on a sane budget or plan to add cabin control later, the Tein Flex Z is the value pick. And if you are simply reviving a stock-height car, four Bilstein B8 dampers restore control for the least money.

Whichever you choose, budget for a professional installation and a corner-balance plus alignment afterward — on a car as sensitive to setup as the NSX, that final step is where the handling actually lives. At NLP Performance in Tampa, FL, we corner-balance every coilover install and reset camber and toe to spec so you get the composure these kits promise. Suspension bushings and top mounts that are original to a 1990s car are also worth inspecting while everything is apart.