| SKU:
33005-AH006
HKS Down Pipe, Metal Catalyzer - Honda Civic Type R FL5
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HKS Metal Catalyzer 33005-AH006 – Honda Civic Type R FL5 (K20C)
Unlock the full potential of your FL5 Civic Type R with the HKS Metal Catalyzer 33005-AH006. Engineered for high-flow performance, this catalytic converter reduces exhaust restriction, improves turbo response, and maximizes power and torque without compromising emissions compliance.
Precision manufacturing, vehicle-specific design, and certified exhaust compliance ensure reliability and performance you can trust. Perfect as a foundation for Stage 1 or Stage 2 builds, this upgrade improves turbo efficiency and gives your FL5 the headroom it needs for further tuning.
Why Upgrade?
The stock ceramic-core cat limits exhaust flow, holding back your engine’s performance. The HKS Metal Catalyzer features:
- Dual 150-cell metal catalysts
- Enlarged 87mm turbine-side diameters
- Lost-wax cast outlet design
- Precision TIG-welded SUS304 stainless construction
- Mirror-polished finish with dedicated heat shield
Performance Gains
- ~51% lower exhaust resistance
- Faster turbo response
- Increased power & torque
- Reduced secondary exhaust pressure
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Improved tuning headroom
Proven Results
- Stock Exhaust: 340 PS / 439 Nm (up from 330 PS)
- HKS + LEGAMAX Sports Exhaust: 347 PS / broader powerband
- LEGAMAX + Power Editor R: 359 PS / 472 Nm
Refined Sport Sound
Enjoy a deeper, sharper exhaust tone without excessive noise:
- Stock: 84 dB
- HKS + Stock Muffler: 87 dB
- HKS + LEGAMAX: 92 dB
Specifications
- Material: SUS304 Stainless Steel
- Catalyst: 150-cell metal
- Pipe Diameter: Φ93 → Φ74.7
- Weight: 6.4 kg (incl. heat shield)
- Minimum Ground Clearance: 125mm
- Engine: K20C
- Model Compatibility: 6BA-FL5 (22/09+)
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