KW V5 Coilover Kit for Acura NSX (NA1) Review & Specs

The KW V5 coilover kit for the Acura NSX is the halo suspension upgrade for Honda's all-aluminum supercar — a fully adjustable, German-built coilover that brings modern World Endurance-derived damping technology to a chassis that first turned a wheel in 1990. The first-generation NSX (chassis code NA1, later NA2) was a benchmark for handling in its day, with a mid-mounted 3.0L C30A VTEC V6 making 270 hp, a double-wishbone suspension at all four corners, and a curb weight of just 3,010–3,110 lb. Three decades later, tired original shocks are the single biggest thing holding these cars back. At NLP Performance in Tampa, FL, we see NSX owners chasing that factory-fresh chassis feel every week — and the KW V5 is the definitive answer. This review breaks down the specs, the driving experience, the fitment details, and how the V5 compares to the more affordable KW V3 and Bilstein B8 options.

Why a 30-Year-Old Supercar Deserves a Modern Coilover

A worn factory damper is the enemy of a mid-engine car. The original NSX rode on twin-tube shocks that were exceptional in 1991 but lose their gas charge and valving precision after 30 years and, in many cases, well over 100,000 miles. On a lightweight, mid-engine platform like the NSX — 3,010 lb, a 99.6-inch wheelbase, and near-50/50 balance — damping quality is felt far more sharply than in a heavy front-engine car. Sloppy rebound control shows up as float over crests, a nervous rear on turn-in, and inconsistent grip mid-corner.

The NSX chassis was famously refined at Suzuka with development input from Ayrton Senna, who pushed Honda to stiffen the monocoque during testing. That aluminum structure is still fundamentally excellent, which is exactly why a high-quality coilover pays off so dramatically: you are not fighting a flexy body, you are unlocking a rigid one. A modern coilover like the KW V5 restores the precise, connected feel the car left the factory with — and then lets you dial in far beyond it.

There is a deeper reason damping matters so much on this car. The NSX was the first mass-produced vehicle to combine an all-aluminum monocoque with forged-aluminum suspension arms at all four corners, and it runs a compliance-pivot double-wishbone layout front and rear. That feather-light unsprung mass reacts instantly to road inputs, so it rewards a damper that can keep pace — and punishes a tired one. Modern tires only raise the stakes: today's 200-treadwear rubber generates far more grip and load than the NSX's original tires, and worn shocks simply cannot control the forces those tires now feed into the chassis. That is the gap a coilover like the KW V5 is built to close.

KW V5 Coilover Kit: Solid Piston Technology Explained

The KW V5 is a 4-way adjustable coilover built around KW's Solid Piston Technology. Unlike a conventional damper that pushes oil through a valved piston inside the shock tube, the V5 separates the valve stacks from the damper's inner tube and piston rod entirely. The solid piston displaces the oil column directly into an external valve housing, where fluid flows through low-speed needle valves and high-speed wave valves. The result is more sensitive, cavitation-free damping with low hysteresis and a low-pressure gas range of just 6–10 bar — the same architecture KW deploys on cars like the Mercedes-AMG GT R and Lotus Emira.

What that means for the driver is genuine, independent control. The V5 gives you KW's SPCLH-A compression adjuster and SPRLH-A rebound adjuster, each offering 13 precise clicks in both the low-speed and high-speed range. In practical terms you can tune low-speed compression (body control under braking and steering) separately from high-speed compression (sharp impacts and curbs), and do the same for rebound. That is a level of separation you normally only find on dedicated race dampers — and it is all street-usable on a road-registered NSX.

How the KW V5 Drives on the NSX

On the road, the KW V5 transforms the NSX from a lovable-but-loose classic into a precise modern sports car without punishing your spine. Because the Solid Piston dampers provide more platform support than conventional shocks, KW can run comparatively softer spring rates while still controlling body motion — so the ride stays compliant over Florida's expansion joints even when the car is set up aggressively. That platform support is what lets a 3,000-lb mid-engine car change direction so cleanly: pitch under braking and roll on turn-in are noticeably reduced, and the rear axle settles instantly instead of pattering.

Take it to a track day and the four-way adjustment earns its price. Add high-speed compression for a bumpy circuit and the tires stay planted over curbing; back off low-speed rebound and the car rotates more freely on corner exit. Each 13-click adjuster produces a repeatable, measurable change, which means you can log settings for each track and dial them back in with confidence. For a car as communicative as the NSX, that transparency is addictive.

Installation, Ride Height, and Fitment

The KW V5 kit is a direct bolt-on for the 1991–2005 Acura NSX, using the factory mounting points at all four corners with no cutting or fabrication. It ships as a complete four-corner kit and, like all KW coilovers, is manufactured in Germany and carries a limited warranty. Because the ride height is independently adjustable via the threaded stainless bodies, you set exactly the stance and corner-weight you want rather than accepting one fixed drop.

Budget roughly 6–8 hours of shop time for a careful install on a lift, and always finish with a professional corner-balance and alignment — the NSX is sensitive to camber and toe, and the whole point of a $6,594.00 coilover is precision. We recommend a mild street drop that preserves suspension travel; going too low on any NSX compromises the geometry and ride quality that make the car special. At NLP Performance we spec these kits with fresh alignment hardware and can advise on target ride heights for street or track use.

KW V5 vs KW V3 vs Bilstein B8: NSX Suspension Compared

Not every NSX build needs a $6,594.00 coilover. NLP Performance stocks three distinct suspension paths for the NA1/NA2 chassis, from a full four-way race-bred coilover down to a simple monotube damper upgrade. Here is how the three stack up so you can match the hardware to your goals and budget.

The KW V3 is the value sweet spot: a German-built, height-adjustable coilover with independent compression and rebound damping (set together as two adjusters rather than the V5's four), for a little over half the price of the V5. It is the right call for owners who want a dialed street car with the option of a track day, but do not need the V5's separate low- and high-speed circuits.

The Bilstein B8 is the entry point — a 46mm monotube performance damper sold per corner ($221.00 each, so roughly $884.00 for all four) that pairs with your OE or sport lowering springs. It restores factory-plus body control at a fraction of a coilover's cost, but it is not height-adjustable and cannot be tuned. Choose it if your springs are good and you simply need to bring damping back to life.

Complementary NSX Chassis Upgrades

A coilover is only as good as the chassis around it. While you have the NSX on a lift, it is worth refreshing the supporting hardware that shapes how the new dampers feel. The most common pairing our NSX customers add is a set of stainless-steel brake lines: after 30 years, rubber OE hoses swell under pressure, and swapping to Goodridge SS lines gives a firmer, more consistent pedal that matches the newfound precision of the suspension.

The Goodridge 91–04 Acura NSX SS Brake Lines ($131.83) use a PTFE inner hose wrapped in a stainless outer braid to eliminate the spongy feel of aging rubber. Fresh alignment hardware, quality tires, and a corner-balance round out a proper suspension refresh. Browse the full range of coilovers and dampers in our coilovers collection to build the setup that fits your NSX.