KW V5 Coilover Kit – 1990–2005 Acura NSX (NA1) | KW Solid Piston Technology | 4-Way Independent Low & High-Speed Damping Adjustment

The KW V5 Coilover Kit for the 1990–2005 Acura NSX (NA1) is KW's most advanced coilover system — a full 4-corner coilover kit featuring KW's proprietary Solid Piston Technology (SPT), modular damper valve design with valves connected in series, and 4-way independent damping adjustment: separate low-speed and high-speed adjustment for both rebound and compression damping. The KW V5 represents the pinnacle of KW's street and motorsport coilover engineering — a system developed from KW's motorsport suspension technology and adapted for the most demanding street and track applications where conventional coilover damping is insufficient. For the NA1 NSX — one of the most revered Japanese sports cars ever produced, with a mid-engine, all-aluminium chassis that rewards precise suspension tuning — the KW V5 is the definitive coilover solution. KW Suspensions is one of the world's most respected coilover manufacturers, with a motorsport heritage spanning the Nürburgring 24 Hours, DTM, and international touring car racing.

Key Features:

• KW Solid Piston Technology (SPT) — KW's proprietary damper piston design — provides more precise, more responsive damping than conventional hollow piston dampers — direct reaction to even small spring travel, minimal steering movements, and minor road undulations without delay
• 4-way independent damping adjustment — separate low-speed and high-speed adjustment for both rebound and compression — 13 clicks (14 characteristic curves) each in the low- and high-speed range for both rebound and compression — the maximum adjustment capability available in a street coilover system
• SPCLH-A compression adjustment — KW Solid Piston Compression Low- and High-Speed Adjustable — independent adjustment of low-speed compression (body motion control) and high-speed compression (bump and kerb response)
• SPRLH-A rebound adjustment — KW Solid Piston Rebound Low- and High-Speed Adjustable — independent adjustment of low-speed rebound (body motion recovery) and high-speed rebound (wheel control after sharp inputs)
• Modular valve design — low- and high-speed valve units built in series with different valve spring types and main valves — enables a completely new type of harmonious damping across the full range of driving inputs
• Cavitation-free function — KW Solid Piston Technology eliminates cavitation — the damper performs consistently without the aeration and cavitation that affects conventional dampers under sustained high-frequency inputs
• Precise high-frequency damping — the V5's Solid Piston Technology provides precise damping response at high frequencies — correct for the NSX's mid-engine chassis where high-frequency road inputs are transmitted directly to the chassis without the isolation of a conventional front-engine layout
• Low-pressure gas range 6–10 bar — low gas pressure range reduces hysteresis and improves damper sensitivity — the damper responds to smaller inputs more accurately
• Lower spring rates possible — the V5's superior platform support allows lower spring rates to be used compared to conventional dampers — achieving the same body control with a more compliant spring for improved ride quality
• Ride height adjustability — adjustable ride height via KW's dirt-resistant trapezoid thread and polyamide threaded ring — easy adjustment even after years of use

KW V5 vs. V3 — Understanding the Difference:

• V3: KW's flagship street coilover — independent rebound and compression adjustment (2-way) — correct for the vast majority of performance street and track day applications where independent rebound and compression tuning provides sufficient adjustment capability.
• V5 (this kit — KWS30950022): KW's most advanced coilover system — 4-way independent adjustment (low-speed and high-speed for both rebound and compression) with KW Solid Piston Technology — correct for the most demanding applications where the V3's 2-way adjustment is insufficient. The V5's ability to independently tune low-speed and high-speed damping in both rebound and compression allows a level of suspension optimization that the V3 cannot achieve — particularly on a platform as sensitive to suspension tuning as the NA1 NSX.
• Summary: The V5 is the correct choice for the NA1 NSX when the maximum available suspension adjustment capability and KW's most advanced damper technology are required — for serious track use, time attack, or owners who want the absolute best available coilover system for their NSX build.

4-Way Adjustment — Low-Speed vs. High-Speed Damping:

The KW V5's 4-way adjustment separates damping into four independently adjustable parameters — each controlling a different aspect of the suspension's behaviour:

• Low-speed compression: Controls the suspension's response to slow body motions — cornering, braking, and acceleration load transfer. Higher low-speed compression reduces body roll and dive/squat. Lower low-speed compression allows more body motion for a more compliant feel.
• High-speed compression: Controls the suspension's response to sharp, fast inputs — bumps, kerbs, and road surface irregularities. Higher high-speed compression provides more resistance to sharp inputs. Lower high-speed compression allows the suspension to absorb sharp inputs more easily.
• Low-speed rebound: Controls how quickly the suspension recovers from slow body motions — body roll recovery, pitch recovery after braking. Higher low-speed rebound slows body recovery for more controlled motion. Lower low-speed rebound allows faster recovery.
• High-speed rebound: Controls how quickly the wheel returns to the road surface after a sharp input. Higher high-speed rebound slows wheel return — preventing the suspension from bouncing after a sharp bump. Lower high-speed rebound allows faster wheel return for better road contact.
• The result: The ability to independently optimize all four parameters allows the V5 to be tuned for any combination of road surface, driving style, and performance requirement — a level of precision that is not achievable with a 2-way or single-adjustment coilover.

The NA1 NSX — Why This Platform Deserves the V5:

The 1990–2005 Acura NSX (NA1) is one of the most revered Japanese sports cars ever produced — a mid-engine, all-aluminium monocoque chassis with double-wishbone suspension at all four corners, a naturally aspirated VTEC V6, and a driving character that rewards precise suspension tuning more than almost any other Japanese sports car of its era. The NSX's mid-engine layout and aluminium chassis make it exceptionally sensitive to suspension setup — the correct spring rates, damper tuning, and ride height have a more pronounced effect on the NSX's handling balance than on a conventional front-engine platform. The KW V5's 4-way independent adjustment and Solid Piston Technology provide the precision required to fully optimize the NA1 NSX's suspension — a coilover system that matches the sophistication of the platform it is installed on.

Specifications:

• Brand: KW Suspensions
• Part Number: KWS30950022
• Barcode: 30950022
• Series: V5 (Variant 5)
• Damper Technology: KW Solid Piston Technology (SPT)
• Damper Adjustment: 4-way independent — low-speed and high-speed rebound and compression (13 clicks / 14 curves each)
• Application: 1990–2005 Acura NSX — NA1 chassis
• Weight: 53.4 lbs (shipping weight)

Fitment Information:

• 1990–2005 Acura NSX — NA1 chassis (Honda NSX in other markets)
• Verify fitment for your specific NSX model year and variant before ordering — confirm that KWS30950022 is the correct V5 kit for your specific NA1 NSX configuration
• Note: A four-wheel alignment is required after coilover installation. Professional installation by an experienced suspension specialist with NSX experience strongly recommended — the NA1 NSX's aluminium chassis and mid-engine layout require specific knowledge for correct coilover installation and alignment.

What's Included:

• KW V5 front coilover assemblies (pair) — INOX-LINE stainless with Solid Piston Technology
• KW V5 rear coilover assemblies (pair) — INOX-LINE stainless with Solid Piston Technology
• All required mounting hardware
• KW adjustment tools for all four damping parameters
• Refer to KW's product documentation for complete kit contents and spring rate specifications

Installation Notes:

• Professional installation by an experienced suspension specialist with NSX experience strongly recommended — the NA1 NSX's aluminium chassis requires correct torque specifications and correct handling to avoid damage to the aluminium suspension components
• A four-wheel alignment is required after coilover installation — do not drive the vehicle at speed before a full alignment is performed
• Set ride height within KW's approved lowering range for the NA1 NSX — exceeding the approved range compromises suspension function and bump travel
• Set all four damping adjustments to KW's recommended baseline settings before the first drive — adjust from the baseline systematically, one parameter at a time, after evaluating the suspension's behaviour
• Inspect all suspension components (control arms, bushings, ball joints, tie rod ends) before installation — the NA1 NSX's suspension components are age-sensitive and should be inspected and replaced as required alongside the coilover installation

Why KW Suspensions?

KW Suspensions is one of the world's most respected coilover manufacturers — a German suspension brand founded in 1995 with a motorsport heritage spanning the Nürburgring 24 Hours, DTM, and international touring car racing. KW's V5 represents the culmination of their motorsport suspension technology applied to a street coilover format — Solid Piston Technology, 4-way independent adjustment, and modular valve design developed from KW's competition suspension programs. For NA1 NSX owners who want the absolute best available coilover system from the most respected coilover manufacturer in the world, KW V5 is the definitive choice.

Perfect For:

• 1990–2005 Acura NSX (NA1) owners who want KW's most advanced coilover system — Solid Piston Technology and 4-way independent low/high-speed rebound and compression adjustment — for the maximum available suspension tuning capability on the NA1 platform
• NSX track day and time attack builds where the V5's 4-way adjustment allows the suspension to be precisely optimized for the specific track, tyre, and driving style
• Owners who want the absolute best available coilover system for their NA1 NSX — a coilover that matches the sophistication and engineering excellence of the NSX platform itself
• Serious NSX builds where the KW V5's Solid Piston Technology, cavitation-free function, and 4-way independent adjustment represent the correct coilover investment for a platform of the NA1 NSX's calibre

Note: Four-wheel alignment required after installation. Set ride height within KW's approved lowering range. Professional installation by an NSX-experienced specialist strongly recommended. Set all four damping parameters to KW baseline before first drive. Adjust one parameter at a time from baseline. Inspect all NSX suspension components before installation.