S2000 Exhaust Buyers Guide: Sound, Power & Real-World Experience

The Complete S2000 Exhaust Guide: Finding Your Perfect Sound and Gains

If you own an S2000, you know the F20C engine’s high-revving character demands the right exhaust to showcase it. But with so many options promising “the best” sound and power gains, where do you actually start? This guide breaks down the most popular S2000 exhaust systems based on real owner experiences, sound profiles, and dyno results.

Understanding S2000 Exhaust Gains

Let’s be clear upfront: no single bolt-on exhaust will dramatically transform your S2000’s power output. Most quality systems deliver 10–15 hp throughout the powerband, with gains concentrated in the mid-range and top-end. The real decision is about sound character, build quality, and how it integrates with other modifications like test pipes. Power gains are secondary to finding the exhaust that matches your driving style and daily-use tolerance for noise.

Top S2000 Exhaust Options

Greddy Spectrum Elite (Go Tuning Spectrum Elite Dual)

The Greddy Spectrum Elite is the refined choice for owners who want performance without constant drone. With 70mm to dual 60mm piping, it delivers 10.9 hp at 8,001 RPM and 6.9 lb-ft of torque at 6,256 RPM. Notably, it sits at just 94 dB at 6,000 RPM—only 2 dB louder than stock—making it one of the quietest quality exhausts available.

Sound-wise, with a stock catalytic converter, the Spectrum Elite sounds similar to a Skunk2 but with considerably less volume. Pair it with a test pipe, and the character shifts to resemble an HKS system. This makes it an excellent middle ground if you want that deeper, more aggressive tone without the raspy quality of some cheaper alternatives. The trade-off is that it won’t give you that “race car” volume some enthusiasts crave at wide-open throttle.

HKS Hi-Power Racing Dual

The HKS Hi-Power is legendary among S2K owners for its sound character. It produces an epic, deep tone that truly showcases the F20C’s scream. The system includes a canister that quiets the exhaust at cruise and idle, meaning you only really hear it under acceleration—a practical touch for street driving.

When paired with a test pipe, the HKS really shines. The combination produces that aggressive, race-inspired growl that kicks in hard above 4,000 RPM. Be aware of drone between 3,000–3,500 RPM under load, a common characteristic of aggressive S2K exhausts. The HKS sits somewhere between the Spectrum Elite’s refinement and the Skunk2’s aggression, making it ideal if you want presence without constant noise.

Skunk2 Mega Power Exhaust

Skunk2 stands out for versatility. It ships with removable silencers, allowing you to dial in the sound from “nearly stock” to fully aggressive. Dyno testing shows the Skunk2 delivers the same power with or without the silencers installed, giving you genuine flexibility without sacrificing gains.

The exhaust produces impressive power throughout the entire powerband and has a fantastic sound character. With silencers, it’s barely louder than stock. Without them, it’s unmistakably a performance machine. The downside? Like most aggressive S2K exhausts, it will drone between 3,000–3,500 RPM, though the Skunk2’s tone makes the drone less objectionable to some owners. This is the choice if you want options and don’t mind tuning your setup over time.

Comptech Exhaust

The Comptech holds a special place in S2K culture for its refined, deep sound that never comes across as raspy or tinny. Unfortunately, it’s no longer in active production, making it a used-market hunt. If you can find one, it represents a vintage sweet spot between performance and daily livability. Many enthusiasts cite the Comptech as one of the best-sounding systems ever made for the platform.

Test Pipe Considerations: A Critical Factor

Since you mentioned running a test pipe alongside your exhaust, this deserves special attention. A test pipe removes the catalytic converter, offering almost as large power gains as many other bolt-on modifications. However, the trade-offs are significant:

• Drone: Expect pronounced drone between 3,000–3,500 RPM under heavy load. This is the unavoidable cost of a test pipe. Drone dies dramatically above 4,000 RPM, where the exhaust produces a beautiful, high-revving character.
• Soot and smell: Without a catalyst, soot accumulates on your bumper, and the exhaust smell becomes noticeably sharper. This may violate local emissions regulations and can mark you for police attention in some areas.
• Legality: Test pipes are illegal for street use in most jurisdictions. If you’re considering one, know the legal risks.

Sound behavior with a test pipe varies by exhaust. The Greddy Spectrum Elite with a test pipe sounds closer to an HKS system. Skunk2 and HKS both produce that aggressive, high-revving wail that defines modified S2K culture. If you’re committed to the test-pipe route, prioritize exhausts with deep, aggressive character over quieter options—the test pipe will amplify everything.

Choosing Based on Your Priorities

If you want daily-driver livability: Greddy Spectrum Elite. It’s refined, legal, and sounds sophisticated without annoyance at cruise. Power gains are solid, and it plays well with future modifications.

If you want aggressive sound without constant drone: HKS Hi-Power Dual. The canister keeps noise down at idle and cruise while delivering presence when you push it. Pair it with a test pipe for maximum character.

If you want flexibility and don’t mind experimenting: Skunk2 Mega Power. The removable silencers let you adjust the vibe, and the power delivery is consistent across the powerband.

If you’re hunting for the ultimate sound: Try to source a used Comptech. It’s a unicorn in the S2K world, but those who own one rarely regret it.

Final Thoughts

The “best” exhaust for your S2000 depends entirely on how you use the car and what trade-offs you’re willing to accept. Sound preference is deeply personal—what sounds aggressive to one owner sounds raspy to another. Before committing, watch exhaust videos at both stock and test-pipe configurations. Listen for the specific RPM ranges you’ll actually experience: freeway cruising, city driving, and wide-open acceleration on a track or highway.

All the exhausts covered here are quality options with loyal followings. Start with what sounds right to your ear, and remember that the exhaust is just one piece of your S2K’s voice. A good intake and intake manifold work will complement your exhaust choice and create a truly harmonious induction and exhaust note.