Code No. 33005-AH006
Unleash the true potential of the CIVIC TYPE R with the new Metal Catalyzer!!
■Features
- The OEM part uses a fine-mesh ceramic catalyst (600 cell +400 cell), while the HKS product incorporates a low-density metal catalyst (150 cell x2).
- Utilizing lost wax casting for the outlet, the vehicle-specific design significantly reduces exhaust resistance
- The exhaust efficiency design and optimal metal ratio achieves both purification performance and low exhaust pressure. Earning official exhaust gas certification from official institutions.
- A specially designed heat shield is included as a countermeasure against heat damaged.
- This product is buffed to a mirror finish and TIG welded. Demonstrating attention to detail.
■Configuration
| Certification number | 33005-AH006 | |
| Main Material | SUS304 | |
| Catalyst Specifications | 150 cell | |
| Diameter of pipe | Φ93 ⇒ Φ74.7 | |
| Proximity Exhaust Noise Level (Idling) | ||
| Stock | LMS | |
| Stock Catalytic Converter | 84dB (59dB) | 93dB (73dB) |
| HKS Catalytic Converter | 87dB (65dB) | 92dB (72dB) |
| Minimum ground clearance (location) | 125mm (OEM Front Under Panel) | |
| Catalyst Weight | 6.4kg (Stock 5.8kg) | |
※LMS… an abbreviation for LEGAMAX Sports(31021-AH005)
※Catalyst weight includes weight of the heat shield.
■Layout Comparison
The layout follows the stock catalyst design. Using data from the genuine catalysts, repeated trail and error tests were conducted to pursue performance goals. Targeting flow bench testing and internal exhaust emission compliance testing. By enlarging inner diameter and reducing the catalyst cell count to 150 cells, achieves the lowest possible exhaust back pressure.
■Performance Comparison
In flow bench testing, the HKS Metal Catalyzer (referred to as the HKS Catalyzer) achieved approximately 51% lower exhaust resistance compared to the stock catalytic converter.
※Graphs and figures are based on internal measurement results. Variations may occur due to individual product differences and measurement equipment.
Point：
～Flange（Turbine Connection）～
The OEM flange has a constriction point of approximately 73mm where exhaust gas flows towards the catalyst.
The inner diameter of the HKS Catalyzer was enlarged to 87mm, reducing exhaust resistance.
～Flange（Muffler Front Pipe Connection）～
The OEM flange connecting to the front pipe has an inner diameter of 53mm.
The inner diameter of the HKS Catalyzer was enlarged to 71.7mm
■Performance Comparison (With HKS Catalyzer only)
※Graphs and figures are based on internal measurement results. Variations may occur due to individual product differences and measurement equipment.
Installing the HKS Metal Catalyzer with the stock muffler, exhaust resistance is reduced. Power increase can be expected at 3800-6500rpm range. In-house testing achieved maximum improvements over stock.
Power：14(19)/6100 (kW(PS)/rpm)
Torque：22(2.3)/5700 (Nm(kgf・ｍ)/rpm)
| Max Power (kW(PS)/rpm) |
Max Torque (Nm(kgf・ｍ)/rpm) |
|
| Stock | 243(330)/6600 | 420(42.8)/3800 |
| HKS Catalyzer + Stock Muffler |
250(340)/6600 | 439(44.8)/3900 |
Test Vehicle：CIVIC TYPE R (6BA-FL5)
Vehicle Specs：METAL CATALYZER 33005-AH006
Stock Muffler
R TYPE INTERCOOLER 13001-AH007
■Performance Comparison (HKS Catalyzer + LEGAMAX Sports)
※Graphs and figures are based on internal measurement results. Variations may occur due to individual product differences and measurement equipment.
By installing the HKS Metal Catalyzer and HKS LMS, exhaust resistance at mid-to–high RPMs are significantly reduced. Power increase can be expected at 3000-7000rpm range. In-house testing achieved maximum improvements over stock.
Power: 15(20)/5700 (kW(PS)/rpm)
Torque: 24(2.5)/5700 (Nm(kgf・ｍ)/rpm)
| Max Power (kW(PS)/rpm) |
Max Torque (Nm(kgf・ｍ)/rpm) |
|
| Stock | 243(330)/6600 | 420(42.8)/3800 |
| HKS Catalyzer + Stock Muffler |
250(340)/6600 | 439(44.8)/3900 |
| HKS Catalyzer + LMS |
255(347)/6600 | 439(44.8)/3900 |
Test Vehicle: CIVIC TYPE R (6BA-FL5)
Vehicle Specs: METAL CATALYZER 33005-AH006
LEGAMAX Sports (Abbreviation :LMS) 31021-AH005
R TYPE INTERCOOLER 13001-AH007
■Performance Comparison (HKS Catalyzer + LEGAMAX Sports + Power Editor R)
※Graphs and figures are based on internal measurement results. Variations may occur due to individual product differences and measurement equipment.
Installing the HKS PER alongside the HKS Catalyzer and HKS LMS, the true potential of boost-up tuning car can be experienced. Power increase can be expected across a wide range approximately 2800-7000RPM. In-house testing achieved maximum improvements over stock.
Power: 36(49)/5700 (kW(PS)/rpm)
Torque: 59(6.0)/4300 (Nm(kgf・ｍ)/rpm)
| Max Power (kW(PS)/rpm) |
Max Torque (Nm(kgf・ｍ)/rpm) |
|
| Stock | 243(330)/6600 | 420(42.8)/3800 |
| HKS Catalyzer + Stock Muffler |
250(340)/6600 | 439(44.8)/3900 |
| HKS Catalyzer +LMS |
255(347)/6600 | 439(44.8)/3900 |
| HKS Catalyzer +LMS+PER |
264(359)/6200 | 472(48.1)/3900 |
Test Vehicle: CIVIC TYPE R (6BA-FL5)
Vehicle Specs: METAL CATALYZER 33005-AH006
LEGAMAX Sports (Abbreviation :LMS) 31021-AH005
R TYPE INTERCOOLER 13001-AH007
Power Editor R (Abbreviation :PER) 42018-AH015
■Exhaust Pressure Comparison
Installing the HKS Metal Catalyzer, the increased secondary exhaust pressure can be reduced even when engine speed increases. The lower the exhaust pressure is, the less load required for the same output value, allowing for greater margin.
By only replacing the HKS Metal Catalyzer, secondary exhaust pressure is reduced by up to 28％ compared to stock.
When installing the HKS Catalyzer and the LEGAMAX Sports a maximum reduction of 40% compared to stock was achieved!
| Maximum Secondary Exhaust Pressure (kPa/rpm) |
|
| Stock | 158.2/6700 |
| HKS Catalyzer + Stock Muffler |
140.6/6500 |
| HKS Catalyzer +LMS |
132.8/6500 |
Test Vehicle: CIVIC TYPE R (6BA-FL5)
Vehicle Specs: METAL CATALYZER 33005-AH006
LEGAMAX Sports (Abbreviation :LMS) 31021-AH005
R TYPE INTERCOOLER 13001-AH007
Power Editor R (Abbreviation: PER) 42018-AH015
※Secondary Exhaust Pressure: Refers to exhaust pressure after the turbocharger to the first catalytic converter
※Pressure valves in table are expressed in absolute pressure.
※ Graphs and figures are based on internal measurement results. Variations may occur due to individual product differences and measurement equipment.
■Sound Comparison
Installing the HKS Catalyzer, the sound emitted from the muffler will change.
In terms of proximity exhaust, the mid- and high-frequency ranges for both the stock muffler and the HKS muffler (LEGAMAX Sports) (Abbreviation: LMS) has been tuned to produce a sportier sound. While replacing the catalytic converter tends to increase proximity exhaust sound, combining with the LMS ensures compliance with safety standards, providing a worry-free experience.
| Combination | Sound Level 【dB】 |
| HKS Catalyzer＋LMS | 92 |
| HKS Catalyzer＋Stock Muffler | 87 |
| Stock | 84 |
※ LMS…LEGAMAX Sports(31021-AH005)
※ Graphs and figures are based on internal measurement results. Variations may occur due to individual product differences and measurement equipment.
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