Honda S2000 Performance Parts: The Complete AP1/AP2 Build Guide

Few cars reward smart modding like the Honda S2000. With a high-revving four-cylinder, near-perfect weight balance, and one of the stiffest open-top chassis Honda ever built, the S2000 doesn't need much to feel like a race car — it needs the right much. This guide walks through the Honda S2000 performance parts that actually move the needle on an AP1 or AP2: chassis bracing, heat management, brake and clutch lines, seat mounting, and the finishing touches that separate a thrown-together roadster from a dialed-in build. Every part listed here is in stock at JSI Racing and fits the 1999–2009 chassis.

AP1 vs AP2: Know Your Chassis Before You Order

Smart S2000 mods start with knowing which car you have. The AP1 (1999–2003) runs the 2.0L F20C, a screamer that makes its power way up top and loves to be wrung out. The AP2 brought revised suspension geometry and, in US cars from 2004 on, the 2.2L F22C1 — a bit less redline, more midrange torque, and friendlier daily manners. The good news for your build: most bolt-on Honda S2000 performance parts carry across both generations, but throttle body hardware, brake lines, and seat brackets are generation-specific. Check fitment years on every product page before you order — we list them right in the title.

Chassis Bracing: The First S2000 Mod Worth Doing

A roadster has no roof to tie the chassis together, so the front strut towers do extra work every time you load the car into a corner. The SPR front strut tower bar for the 1999–2009 Honda S2000 ties both towers together with gusset-plate mounts, sharpening turn-in and keeping your alignment settings honest under hard cornering. It's a one-afternoon install with basic hand tools, and it's the rare mod you feel on the very first drive. If you want the deeper theory on why bracing works, our strut tower bar buyer's guide breaks it down.

Browse the full strut tower bar collection for other chassis in your garage.

Heat Management: Free Consistency for the F20C and F22C

Honda's F-series intake sits close to a lot of hot metal, and heat soak is the quiet killer of consistent throttle response on track days. P2R Power Rev Racing builds targeted fixes for both generations:

• 00–05 S2000 thermal throttle body gasket — blocks coolant heat from migrating into the throttle body on AP1 and early AP2 cars
• 06+ S2000 throttle body spacer — the same heat-isolation principle for late AP2 drive-by-wire cars

These are inexpensive, stack with any intake setup, and install in under an hour. We covered the science in our thermal throttle body gasket explainer — the short version is that cooler intake hardware means denser air and more consistent power, pull after pull. Find more Honda-focused engine upgrades in the P2R Power Rev Racing collection.

Brake and Clutch Lines: Firm Pedal, Clean Bay

Twenty-year-old rubber brake hoses flex under pressure, and on a momentum car like the S2000 a vague pedal costs you real lap time. Finishing Lines builds stainless upgrades specifically for this chassis:

• 00–05 S2000 caliper hose set and 06–09 caliper hose set — stainless braided lines for a firmer, more communicative pedal
• S2000 ABS relocation kit V2 (2000–2005) — relocates the ABS unit for a dramatically cleaner engine bay without deleting it
• S2000 two-piece clutch tuck line — routes the clutch line out of sight for show-quality bay presentation

Shop the whole Finishing Lines collection for reservoirs, fittings, and tuck hardware that round out the look.

Lock Yourself In: Seats and the Details That Finish a Build

An S2000 build guide isn't complete without talking about the driver. If you're adding a fixed-back or reclinable aftermarket seat, Planted Technology makes bolt-in steel brackets for both generations — AP1 chassis (1999–2006) driver side and AP2 chassis (2007–2009) driver side, with passenger-side versions of each. A solid mount keeps you planted so you can be smoother on every input.

For the engine bay itself, Fast Turn Fittings offers staged titanium dress-up: the Stage 1 titanium hardware engine bay kit for the S2000 replaces corroded factory bolts with burned-finish titanium, and Stage 3 goes full coverage. Titanium won't rust, weighs roughly half what steel does, and turns routine hardware into a visual signature.

Pro Tip: Mod in the Right Order

The fastest S2000 upgrades path is the unglamorous one: refresh before you add. Start with the contact points — brake lines, fluid, alignment — then bracing, then heat management, then seats and dress-up. A braced, well-aligned, firm-pedal S2000 on healthy rubber will embarrass a parts-catalog car that skipped the fundamentals. And whichever generation you drive, buy parts by your exact model year; the AP1/AP2 split (and the 2006 drive-by-wire change) is where most wrong orders happen.

Build Your S2000 with JSI Racing

Whether you're chasing a cleaner bay, a sharper front end, or a full track build, we stock the Honda S2000 performance parts to get you there — from SPR bracing to P2R heat management, Finishing Lines brake hardware, Planted seat brackets, and Fast Turn titanium. Start with the full Honda collection, and if you're building more than one car, the alignment kits collection will keep every setup honest. Order today and get your S2000 ready for its best season yet.