Best Honda S2000 Performance Mods (AP1 & AP2 Guide)

The Honda S2000 is one of the greatest naturally aspirated roadsters ever built, and the right Honda S2000 performance mods turn an already-brilliant chassis into a genuine giant-killer. Whether you own an AP1 with the screaming 9,000-rpm F20C or an AP2 with the torquier F22C1, this guide covers the eight upgrades our Tampa, FL customers reach for most — from the legendary HKS GT2 supercharger to KW V3 coilovers, standalone engine management, and lightweight carbon. Every part below is in stock and confirmed to fit 2000–2009 S2000s.

Why the Honda S2000 Is the Ultimate Mod Platform

The Honda S2000 is a front-mid-engine, rear-wheel-drive roadster with a near-perfect 50/50 weight distribution and a curb weight of roughly 2,800 lbs — the ideal blank canvas for performance mods. The AP1 (2000–2003 U.S.) uses the 2.0L F20C, rated at 240 hp at 8,300 rpm and 153 lb-ft at 7,500 rpm, spinning to a 9,000-rpm redline. That is 120 hp per liter, one of the highest specific outputs of any naturally aspirated production engine ever sold.

The AP2 (2004–2009) swapped in the 2.2L F22C1, making 237 hp and a healthier 162 lb-ft while dropping the redline to about 8,000 rpm for stronger mid-range torque. Both engines share a bulletproof bottom end that responds beautifully to boost, and the chassis rewards suspension tuning like few cars at any price. The upgrades below are grouped by goal — power, fueling, breathing, handling, and weight — so you can build in a smart order.

Best Power Upgrade: HKS GT2 Supercharger System

The HKS GT2 S/C System Pro is the definitive power adder for the S2000. It is a complete, belt-driven supercharger kit engineered specifically for the AP1 and AP2 F-series engines, and HKS markets it as a 100-plus horsepower upgrade over stock. Because it is positive-displacement and boost builds low in the rev range, the GT2 transforms the S2000's biggest stock weakness — thin low-end torque below VTEC — into a broad, linear pull all the way to redline. Properly tuned on pump gas, boosted F-series cars routinely land in the 320–370 wheel-horsepower range.

Fueling and Engine Management for Forced Induction

A supercharger is only as safe as the fuel and tune behind it. The stock S2000 ECU cannot properly manage boost, so a standalone or plug-in engine management system is mandatory once you add the GT2. The Haltech Platinum PRO Direct Kit is a plug-and-play standalone that gives you full control over fuel, ignition timing, and boost, and it is the tuner's choice for building a bulletproof map. It is a direct fit for 2000–2009 AP1 and AP2 cars.

You also need bigger injectors to feed a boosted engine. Grams Performance 1,150cc/min high-impedance injectors (set of four) provide the headroom for 350-plus horsepower and are compatible with pump gas and E85 thanks to their stainless internals. They are a direct swap for the S2000's fuel rail and pair perfectly with the Haltech for a clean, fully-tuned setup.

Best Bolt-On Breathing: HKS Hi-Power Exhaust

The HKS Hi-Power cat-back is the classic S2000 exhaust for good reason: it frees up the F-series to rev, sheds weight over the heavy factory system, and delivers that iconic high-rpm HKS rasp without droning on the highway. Built from SUS304 stainless steel with a mandrel-bent 60mm-plus main pipe, it is a straightforward bolt-on for 2002–2007 cars and an ideal first breathing mod whether you stay N/A or go forced-induction later.

Suspension and Handling: KW V3 Coilovers and Eibach Sway Bars

The S2000 chassis is world-class out of the box, so quality suspension pays off more here than almost any other mod. The KW Variant 3 (V3) coilover kit is our top handling pick: a German-made, stainless-bodied system with independent rebound and compression damping adjustment plus height adjustability. It lets you dial in a track-ready corner balance while keeping enough compliance for daily street driving — the reason it is a benchmark for the S2000 community.

To sharpen turn-in and control body roll, add the Eibach 32mm front and 29mm rear anti-roll bar kit. Both bars are tubular and two-way adjustable, so you can fine-tune the S2000's balance from mild understeer to lively rotation right at the bar end-links — no re-tune required. It is one of the cheapest ways to make the car feel dramatically more planted on a canyon road or an autocross course.

Cooling and Weight: Mishimoto Oil Cooler and Seibon Carbon Hood

The high-revving F-series makes heat, and oil temperature is the number-one reliability concern on track days — especially once you add boost. The Mishimoto Thermostatic Oil Cooler Kit is a direct-fit answer, using a 19-row cooler mounted in the front grille with a thermostatic sandwich plate that only opens once oil reaches operating temperature. That means faster warm-up in the cold and stable temps when you are pushing hard, without the overcooling problems of a non-thermostatic setup.

For weight savings and looks, the Seibon MG-style carbon fiber hood trims meaningful mass off the nose — a hand-laid carbon panel that replaces the heavy steel factory hood and lowers the car's polar moment right over the front axle. It fits 2000–2010 S2000s and adds instant motorsport presence while helping the S2000's already-sharp front end feel even lighter.

Honda S2000 Mods Compared

Here is how the top S2000 upgrades stack up by category, what each one delivers, and current pricing at NLP Performance. Use it to plan your build order and budget.

How to Prioritize Your S2000 Build

Build in a smart order and every dollar works harder. For a naturally aspirated street-and-track S2000, start with suspension — KW V3 coilovers and Eibach sway bars — because the chassis rewards grip more than power at stock output. Add the HKS Hi-Power exhaust and a Mishimoto oil cooler next for sound, breathing, and reliability on track.

If big power is the goal, plan the forced-induction path as a package: the HKS GT2 supercharger, Haltech Platinum PRO ECU, and Grams 1,150cc injectors should be bought and installed together, then tuned on a dyno. Never add boost without the fuel and management to support it. Our team in Tampa, FL can help you spec a complete stage-based build so the parts work together the first time.