Honda S2000 Performance Tuning with the AEM V2 Intake: Installation and Power Results

The Honda S2000 remains one of the most revered front-engine, rear-drive sports cars ever produced, largely due to its legendary high-revving F20C (and later F22C) engine. With a redline exceeding 8,000 rpm in early models, this naturally aspirated powerplant delivers an intoxicating blend of linear power and razor-sharp throttle response. For owners seeking to extract additional performance without sacrificing reliability or daily drivability, a high-quality cold air intake is often the first step. Among the most trusted options is the AEM V2 intake system, which has earned a strong reputation within the S2000 community for its proven gains and robust construction. This article provides an in-depth guide to installing the AEM V2 intake on a Honda S2000, examines the power results from dyno testing and real-world driving, and offers practical advice for maximizing the upgrade.

Understanding the AEM V2 Intake

The AEM V2 intake system is specifically engineered to reduce airflow restriction and lower intake air temperatures compared to the factory intake. Unlike short-ram intakes that draw in hot engine bay air, the V2 positions its high-flow air filter in a cooler, pressurized area — typically behind the front bumper or inside the front fender. This cold-air design is critical for maintaining air density, which directly impacts combustion efficiency and power output.

The system features a larger-diameter, mandrel-bent aluminum intake tube with a smooth internal finish. This design minimizes turbulence and allows the engine to breathe more freely. The filter itself is a dry-flow, non-oiled design (using AEM's proprietary synthetic media) that offers high filtration efficiency and does not risk contaminating the mass airflow sensor with excess oil — a common issue with oiled cotton filters.

From a materials perspective, the AEM V2 intake is constructed with 6061 aluminum tubing, polished for appearance and durability. The included silicone couplers and stainless steel clamps provide leak-free connections. The system is CARB-exempt (California Air Resources Board) for many applications, making it street-legal in states that follow CARB regulations. For the Honda S2000, the kit is typically designed to fit both the AP1 (2000–2003) F20C and AP2 (2004–2009) F22C engines, though minor variations exist between model years. It is always recommended to verify compatibility with your specific vehicle before purchasing.

Compared to the restrictive factory airbox and accordion-style intake tube, the AEM V2 offers a significant improvement in airflow volume and velocity. The factory system is tuned for low noise and low cost, not peak power. By contrast, the AEM V2 is designed to support higher-rpm power production, which is exactly where the S2000's engine shines. The result is improved throttle response, a more aggressive intake note, and measurable power gains.

Installation Process: Step-by-Step Guide

Installing the AEM V2 intake on a Honda S2000 is a straightforward job that can be completed in approximately 1–2 hours by a competent DIY enthusiast. Basic hand tools are required, and detailed instructions are included with the kit. However, careful attention to routing and sensor placement is essential to avoid check engine lights or poor fitment. Below is a comprehensive walkthrough.

Tools and Materials Needed

  • 10mm socket and ratchet
  • 12mm socket and ratchet
  • 8mm socket (or nut driver) for hose clamps
  • Phillips #2 screwdriver
  • Flathead screwdriver (for prying clips)
  • Torque wrench (for re-installing battery and intake bolts)
  • Ratchet extensions (6” and 12”)
  • Pair of pliers (for hose clamps)
  • Shop towel or rag
  • Flashlight (to inspect concealed areas)

Pre-Installation Preparation

Work in a clean, well-lit area. Allow the engine to cool completely before beginning. Disconnecting the battery is a safety measure that also resets the ECU's learned fuel trims, allowing it to adapt more quickly to the increased airflow. It is also a good time to inspect the condition of the cooling system hoses and wiring harnesses that you will encounter.

Removing the Factory Intake System

  • Step 1: Disconnect the negative battery terminal. Use a 10mm socket to loosen the clamp, then move the cable away from the battery post. Ensure it does not contact the terminal inadvertently.
  • Step 2: Remove the engine cover. The S2000's engine cover is held by four bolts (10mm) at each corner. Remove them and lift the cover straight up. It may be tight against the strut bar; tilt it slightly to clear.
  • Step 3: Unplug the mass airflow sensor (MAF) connector. Located on the factory intake tube between the airbox and the throttle body. Press the tab and pull the connector straight out. Carefully route the wire harness out of the way.
  • Step 4: Loosen the clamps on the factory intake tube. Use a flathead screwdriver to loosen the worm-gear clamps at the throttle body and the airbox junction. Slide the intake tube off the throttle body and remove it.
  • Step 5: Unbolt the factory airbox. The airbox is secured by two 10mm bolts at the front and one 12mm bolt at the rear (near the firewall). Remove these bolts and lift the airbox assembly out. You may need to wiggle it free from the rubber isolators.
  • Step 6: Remove the factory intake resonator and ducting. The S2000 has a plastic intake duct that runs from the airbox toward the front bumper. Remove any screws or push clips holding it in place, and pull it out through the engine bay. This clears the path for the AEM V2 cold-air pipe.

Installing the AEM V2 Intake

  • Step 7: Mount the AEM V2 filter and pipe assembly. The kit includes a long aluminum tube that routes from the factory intake opening (behind the driver-side headlight) to the throttle body. Begin by loosely attaching the silicone coupler to the throttle body end. Insert the tube through the engine bay, guiding the filter end into the original airbox location or the new cold-air opening (specific to kit). Secure the tube with the supplied rubber grommets and bracket to the chassis. Tighten the coupler clamp at the throttle body to 5–7 ft-lb (do not overtighten).
  • Step 8: Attach the high-flow air filter. Slide the filter onto the end of the tube and tighten the clamp. Ensure the filter is positioned to draw air from behind the bumper or from the designated cold-air source. Check that it does not rub against the radiator or bodywork.
  • Step 9: Install the MAF sensor. Transfer the MAF sensor from the factory intake tube to the AEM V2 tube. The tube has a pre-drilled hole with a rubber grommet. Insert the sensor and secure it with the screws (taken from the factory tube). Be careful not to damage the delicate sensing elements. Connect the electrical connector.
  • Step 10: Reinstall the positive crankcase ventilation (PCV) hose. The AEM V2 kit may include a small hose barb. Connect the PCV hose from the valve cover to the barb (or to the provided fitting on the intake tube). Use the supplied vacuum cap to seal any unused ports on the throttle body.
  • Step 11: Double-check all connections. Ensure all clamps are tight, hoses are properly routed, and nothing is pinched. Verify that the intake tube does not contact the fan, belt, or any hot surfaces. Turn the steering lock to lock to check clearance.
  • Step 12: Reconnect the battery. Tighten the terminal clamp. Start the engine and let it idle for a few minutes. Listen for any hissing sounds indicating a leak. Check the MAF sensor connection — a loose connection can trigger a check engine light. Rev the engine gently and confirm smooth operation.
  • Step 13: Reinstall the engine cover. Place the engine cover back over the engine and secure it with the four bolts. If the intake tube contacts the cover, you may need to trim a small section of the cover’s plastic (though for most S2000 applications, clearance is adequate).

Post-Installation Tips

After the initial startup, take the car for a short drive and allow the ECU to adapt. The first few miles may feel slightly different as the fuel trims adjust to the increased airflow. It is recommended to perform a full throttle acceleration run (in a safe location) from 2,000 rpm to redline to let the system learn. Some owners choose to perform an idle relearn procedure: after the car has reached operating temperature, let it idle for 10 minutes with all accessories off, then drive gently for another 10 minutes.

Power Results: Dyno Testing and Real-World Gains

The primary motivation for upgrading to an AEM V2 intake is the promise of additional horsepower and torque. Independent dyno testing and owner-reported results consistently show meaningful improvements for the Honda S2000.

Dyno Testing Data

On a chassis dynamometer — corrected for atmospheric conditions — the AEM V2 intake typically produces gains of 10–15 rear-wheel horsepower and 8–12 lb-ft of torque over the factory intake. These gains are most pronounced from 5,500 rpm to redline, where the factory intake becomes a bottleneck. The torque curve also becomes flatter, with improved mid-range response. For example, an S2000 AP1 with stock exhaust and tune might baseline at 195–205 whp (depending on the dyno). After installing the AEM V2, the same car might see 208–218 whp. On an AP2 with the F22C engine and slightly lower redline, similar percentage gains are observed.

It is important to note that these gains are achieved with the intake alone — no additional engine management or exhaust changes. If the car already has a header, exhaust, and ECU tune, the AEM V2 can contribute further gains, often in the 5–10 hp range, because the whole system now flows better. Many experienced tuners recommend the AEM V2 as a foundational mod before upgrading to a full exhaust and reflash.

Real-World Performance Impressions

Beyond the dyno numbers, the AEM V2 intake transforms the driving experience. The most immediate change is the intake sound: a deep, rushing roar under heavy throttle that becomes a high-pitched induction howl near the redline. This auditory feedback makes the car feel more alive and responsive. Owners report a noticeable improvement in throttle response — the engine seems more eager to rev, with less hesitation when you stab the gas. During highway passing or canyon driving, the car pulls harder in the upper gears, requiring fewer downshifts.

Fuel economy typically remains unchanged or improves slightly because the engine breathes more efficiently at cruising speeds. However, the temptation to enjoy the new sound often leads to more aggressive driving, which can reduce fuel economy temporarily. In terms of reliability, the dry-flow filter traps dirt effectively without the risk of oil contamination of the MAF sensor — a known issue with some oiled filters on the S2000.

Considering an ECU Tune

While the AEM V2 intake works well on a stock ECU, pairing it with a professional tune (e.g., FlashPro or reflash) can unlock additional gains. The factory ECU can adapt to a certain extent, but a custom tune can optimize the air/fuel ratio and ignition timing specifically for the increased airflow. Many owners report an additional 5–8 whp after tuning the car with the intake. If you plan to eventually add a header or exhaust, a tune becomes even more beneficial. Reputable tuning resources can be found at S2Ki.com forums, where owners share dyno sheets and tuning advice.

Maintenance and Longevity

The AEM V2 intake is designed for long-term use with minimal maintenance. The dry-flow filter can be cleaned with AEM's cleaning solution (or just water for light dust) and allowed to air dry. AEM recommends inspecting the filter every 15,000 miles and cleaning it when dirty. In dusty environments, more frequent cleaning may be necessary. Do not oil the filter — it is a dry filter and oil will reduce performance.

Check the clamps and couplers every oil change to ensure they haven't loosened. The aluminum tube may collect road grime; wipe it clean with a damp cloth. The MAF sensor should be inspected for contamination. If you experience drivability issues or a check engine light for lean conditions, clean the MAF sensor with a dedicated MAF cleaner spray — avoid touching the wires.

Alternative Intake Options for the Honda S2000

While the AEM V2 is one of the most popular choices, several other intakes are available for the S2000. The K&N Apollo is a short-ram design that fits some owners seeking a low-cost option, but it draws hot engine bay air and produces fewer gains. The Ingen RS cold air intake offers similar construction to the AEM V2 and comparable power, but fitment can be tighter. The Ballade Sports intake is another option, often used in track builds. However, the AEM V2 distinguishes itself with its out-of-the-box fitment, CARB exemption, and consistent dyno results. For a comprehensive comparison, Hondas2000.com offers detailed reviews of multiple intake systems. Ultimately, the best intake is the one that installs cleanly, filters well, and delivers the power where you need it — and the AEM V2 ticks all those boxes.

Conclusion

The AEM V2 intake is a proven, reliable upgrade for the Honda S2000 that delivers genuine power gains, improved throttle response, and a more engaging driving experience. The installation is straightforward and within reach of the average enthusiast, making it an ideal first mod for owners looking to wake up their engine. With gains of 10–15 horsepower and an aggressive induction sound, it transforms the car without sacrificing streetability or emissions compliance. Whether you are daily driving your S2000 or preparing it for track days, the AEM V2 intake is a solid investment that pays dividends every time the VTEC kicks in. For further reading and community feedback, AEM's official product page provides technical specifications, and Dynojet's blog covers general performance tuning principles applicable to the S2000. Combine this intake with proper maintenance and an ECU tune, and you'll unlock even more of the S2000's potential.