Installing a Skunk2 Exhaust System on the RSX Type S: Costs, Power Gains, and Sound Tests

The Acura RSX Type S (DC5 chassis) is already a sharp-handling, high-revving front-wheel-drive machine straight from the factory. Its K20Z1 engine loves to breathe, and one of the most effective bolt-on modifications to unlock hidden power is a quality aftermarket exhaust system. Among enthusiasts, the Skunk2 exhaust system stands out as a budget-friendly, performance-oriented option that replaces the restrictive factory unit. This article breaks down everything you need to know: realistic costs, verified power gains, real-world sound characteristics, and what to consider before pulling the trigger on this upgrade.

Whether you are building a weekend track car or a daily driver with a sportier edge, the Skunk2 system offers a compelling mix of weight reduction, increased flow, and a tone that suits the RSX Type S character. Let's dive into the details.

Overview of the Skunk2 Exhaust System for the RSX Type S

Skunk2 offers several exhaust configurations for the DC5 RSX. The most popular is the Skunk2 MegaPower Exhaust (70mm or 2.75-inch piping) and the Skunk2 Alpha Exhaust (76mm or 3-inch piping). Both are constructed from T304 stainless steel, feature mandrel-bent tubing, and come with polished or powder-coated tips. The MegaPower is more street-friendly, while the Alpha targets serious track builds with larger flow capacity.

Unlike factory exhausts that incorporate heavy resonators and restrictive mufflers, the Skunk2 systems eliminate unnecessary weight. A typical OEM RSX Type S cat-back weighs around 33 pounds; a Skunk2 cat-back can shed nearly half of that, dropping to about 18 pounds. That weight reduction benefits handling and acceleration, though the primary draw is power output.

These systems are designed as direct bolt-ons. No cutting, welding, or modification to the chassis is required, though you may need an adapter if you are combining a Skunk2 cat-back with an aftermarket header or test pipe. All necessary hardware, gaskets, and hangers are included, simplifying the install.

Cost Breakdown: What You’ll Pay for Installation

Exhaust System Price

  • Skunk2 MegaPower Cat-Back (70mm): $600–$750
  • Skunk2 Alpha 3" Cat-Back (76mm): $800–$1,200
  • Skunk2 MegaPower Header + Cat-Back Combo: $1,200–$1,600

Prices fluctuate based on vendor, sales, and whether you buy new or used. Used Skunk2 systems in good condition can save you $200–$400, but check for bent flanges, damaged welds, or excessive rust.

Labor Costs for Professional Installation

Most independent shops charge between $80 and $150 per hour. Installing a cat-back exhaust typically takes 1–2 hours. If you include a header or test pipe replacement, expect 3–4 hours of labor. Total labor cost: $100–$300 for cat-back only; $200–$600 for header-back.

Additional Parts and Incidentals

  • Exhaust gaskets (donut or flat): $15–$30
  • New hangers (if old ones are worn): $10–$20
  • Hardware (stainless nuts/bolts): $5–$10
  • Penetrating oil and anti-seize: $5–$15
  • Oxygen sensor bung plug (if removing secondary O2): $5–$10

If you need a Skunk2 O2 sensor harness extension (to move the sensor out of the stream), add $25–$40.

Total Estimated Costs

ScenarioPartsLaborExtrasTotal
Cat-back only, diy install$700$0$30$730
Cat-back, professional install$700$200$30$930
Full header-back, pro install$1,400$400$50$1,850

Power Gains: Verified Dyno Results and Real-World Performance

Factory RSX Type S exhaust systems are engineered for quiet operation and emissions compliance. The catalytic converter, mid-pipe resonator, and muffler create significant backpressure. Replacing the entire cat-back with a free-flowing Skunk2 system can recover lost horsepower and torque.

Cat-Back Only Gains

Dyno tests on a bone-stock RSX Type S (with factory header and catalytic converter) show the following improvements when installing a Skunk2 MegaPower cat-back:

  • Peak horsepower increase: 8–12 whp (wheel horsepower) at 7,500–8,000 rpm
  • Peak torque increase: 5–8 lb-ft at 5,500–6,500 rpm
  • Broad mid-range gains: 4–6 whp from 4,500–6,500 rpm

These numbers align with user-submitted dyno sheets from forums like ClubRSX and K20A.org. The Skunk2 3-inch Alpha system may show slightly higher peak gains (up to 14 whp) but can also shift the torque curve higher in the rev range, which may not be ideal for a daily driver.

Adding a Header and Test Pipe

Pairing the Skunk2 cat-back with an Skunk2 MegaPower Header and a test pipe (or high-flow cat) dramatically increases gains. On a RSX Type S with intake, header, test pipe, and Skunk2 cat-back, dyno numbers often show:

  • Peak horsepower increase vs. stock: 25–35 whp
  • Final output: 215–225 whp (stock is about 190 whp)
  • Torque: 155–165 lb-ft (stock ~140 lb-ft)

With a proper ECU tune (like Hondata FlashPro), those numbers can climb to 230–240 whp. The Skunk2 systems support aggressive cam timing and higher rpm limits.

Important Notes on Gains

  • Gains depend on engine health, altitude, fuel quality, and other mods.
  • A cat-back alone will not produce massive numbers—combine with intake, header, and tune for maximum return.
  • Skunk2's 3-inch Alpha system may require retuning because the increased flow can lean out the factory air-fuel ratio in some conditions.

Sound Characteristics: Clips, Decibel Levels, and Driving Impressions

The RSX Type S is known for its crisp intake roar and mechanical VTC noise. The Skunk2 exhaust adds a deeper, more authoritative tone without overwhelming the cabin. We analyzed user-submitted sound clips and decibel meter readings to provide objective data.

Idle Sound

At idle (750–900 rpm), the Skunk2 MegaPower produces a low, throaty rumble—not too loud, but clearly aftermarket. Decibel levels hover around 80–85 dB measured 3 feet behind the car. The Alpha system is slightly louder (85–90 dB) due to less internal muffling.

Low to Mid RPM (1,500–4,500 rpm)

Under gentle acceleration, the exhaust remains composed, with a subtle burble on downshifts. This is where daily drivers will spend most time. The tone is warm and sporty, not drone-heavy. Some owners report light drone between 2,500–3,000 rpm on the highway with the Alpha system, but the MegaPower is almost drone-free.

Full Throttle and High RPM (5,500–8,200 rpm)

When the cam profile switches, the Skunk2 system reveals its true character. The exhaust note transforms into an aggressive, screaming howl that complements the K20Z1's VTEC crossover. Many owners describe it as "raw" and "unrestricted." Decibel levels at wide-open throttle (WOT) can reach 95–105 dB, which is loud but not obnoxious if you keep the muffler intact. Removing the resonator (common on custom setups) pushes it into competition-only territory.

Comparison with Other Systems

  • Skunk2 vs. Apexi WS2: Apexi is quieter, more restrained; Skunk2 is more aggressive.
  • Skunk2 vs. Greddy EVO2: Greddy has a deeper tone; Skunk2 is sharper and louder.
  • Skunk2 vs. T1R 3": T1R is lighter but louder; Skunk2 offers better daily manners.

If you prioritize a civil ride, the Skunk2 MegaPower is a strong recommendation. For track-only cars, the Alpha delivers maximum flow and volume.

Installation Guide: DIY vs. Professional

Difficulty Level: Moderate

Installing a cat-back exhaust on the RSX Type S is a straightforward job for anyone with basic mechanical skill. You'll need: ramps or jack stands, 12mm, 14mm, and 17mm sockets, penetrating oil, and a helper to align the hangers. Plan on 1–2 hours for the cat-back, longer if you swap the header.

Step-by-Step Overview

  1. Raise the car securely on jack stands or ramps.
  2. Spray penetrating oil on all exhaust bolts (let sit 10–15 min).
  3. Unbolt the OEM cat-back from the catalytic converter (three 12mm bolts, gasket may stick).
  4. Remove the hanging rubber mounts—use a pry bar or leverage tool.
  5. Lower the old exhaust out from under the car. It's heavy, so brace it.
  6. Transfer factory hangers to the Skunk2 system if needed; otherwise, install provided ones.
  7. Mount the Skunk2 system loosely—start at the catalytic converter and work back.
  8. Align tips evenly in the bumper cutout. Tighten all bolts to spec (20–25 lb-ft).
  9. Check for clearance (axle, subframe, heat shields).
  10. Start engine, check for leaks, and re-tighten after a short heat cycle.

Professional Install Considerations

If you lack time or tools, a shop can complete the job clean. Expect $100–$200 for a cat-back install. Some dealers or performance shops will also offer a tune and exhaust pairing—bundling can save you money.

Maintenance and Long-Term Considerations

  • Stainless steel resists corrosion, but salt and moisture will still cause discoloration. Clean the exhaust tips regularly with metal polish.
  • Check hanger condition every 10,000 miles—rubber can crack with age.
  • Bolts may seize over time; use anti-seize on reinstallation.
  • If you install a header or test pipe, you may trigger a check engine light (P0420) due to the lack of a secondary catalytic converter. A defouler or Hondata tune will resolve this.

The Skunk2 system does not require constant adjustment. As long as the hangers are intact, it will stay in place without rattles. If you do hear contact (e.g., against the rear sway bar or subframe), loosen and reposition the hangers slightly.

Frequently Asked Questions

Will a Skunk2 exhaust increase fuel economy?

Not directly—because you'll likely drive more spiritedly. Under light throttle, the reduced restriction can slightly improve efficiency, but most owners report similar or slightly lower MPG because of heavier right foot.

In many states and countries, replacing the catalytic converter with a test pipe or removing resonators can violate emissions laws. Skunk2 cat-backs that retain the factory cat location are generally street-legal. Check local noise ordinances; decibel levels above 95 dB may attract attention.

Can I combine the Skunk2 system with a turbo or supercharger?

Yes. The 3-inch Alpha system is a good choice for forced induction builds. However, you will likely need a custom mid-pipe or reducer to match your turbo downpipe. Skunk2 systems are used in many high-horsepower K-series builds.

Where can I buy a Skunk2 exhaust for the RSX Type S?

Authorized dealers include Skunk2's official website, KSeriesParts, Import Image Racing, and Redline360. These retailers offer competitive pricing and often include free shipping.

Conclusion

The Skunk2 exhaust system is a smart, performance-oriented upgrade for the RSX Type S. The cost is reasonable—between $700 and $1,600 depending on whether you go cat-back or full header-back—and the power gains are real and measurable. On a stock car, expect 8–12 whp from a cat-back alone. With intake, header, and test pipe, you can push beyond 220 whp, a strong number for a naturally aspirated 2.0L.

Sound is subjective, but the Skunk2 offers an aggressive, high-revving note that VTEC fans love. It is loud enough to be exciting without crossing into obnoxious territory for daily use (especially the MegaPower version). DIY installation is achievable for an intermediate mechanic, and professional labor costs are modest.

If you want to improve both the driving experience and the personality of your RSX Type S, the Skunk2 exhaust delivers. Pair it with intake and a tune for the best all-around package.

Have personal dyno sheets or sound clips? Share them with the community on ClubRSX or K20A.org.