Premium 2.5″ Universal Catalytic Converter with O2 Port – Euro V Certified | 400 CPSI High Performance | 409L Stainless Steel
This premium 2.5″ Universal Catalytic Converter delivers >95% pollutant reduction and seamless integration for modern exhaust systems.
Engineered for Drivers Who Demand Efficiency & Compliance
This premium catalytic converter delivers advanced pollutant reduction and seamless integration for modern automotive exhaust systems. Designed for owners facing strict emission tests, aging exhaust systems, or persistent P0420 error codes—it turns compliance headaches into driving confidence.
1. Top Features Mechanics Trust
High-Efficiency Conversion
Simultaneously oxidizes $\text{CO}\rightarrow\text{CO}_2$, reduces $\text{NO}_x\rightarrow\text{N}_2$, and burns $\text{HC}\rightarrow\text{H}_2\text{O}$ at $\lambda\approx1$—fully meets and exceeds Euro 4, Euro 5, and OBDII standards.
Low-Backpressure Oval Design
The high-performance 400 CPSI cell density combined with an optimized oval/flat spun body shape reduces exhaust restriction, maximizing flow capacity compared to generic restrictive units.
Durability First
Built with a high-grade 409L stainless steel body and an integrated aluminized steel heat shield to withstand extreme continuous exhaust heat, protect underbody components, and prevent thermal cracking.
Zero Compromise Fit
Features a pre-welded O2 sensor port for hassle-free oxygen sensor re-installation, specifically tailored for front position applications to ensure a reliable retrofit and upgrade.
2. Technical Specifications
| Parameter | Detail |
| Product Name | Exhaust Pipe Catalytic Converter |
| OE NO. | 1601787295547 |
| Brand Name | 3waycatalyst |
| Inlet/Outlet Diameter | 2.5 inch / 63.5mm |
| Body Shape | Oval / Flat Spun |
| Body Material | High Grade 409L Stainless Steel |
| Shield Material | Aluminized Steel |
| Special Features | With Heat Shield & Pre-welded O2 Sensor Port |
| Cell Density | 400 CPSI (High Performance) |
| Emission Standard | Euro 4 / Euro 5 / OBDII Compliant |
| Fuel Type | Gasoline |
| Position | Front |
| Universal Fitment | No (Direct-Fit Style Engine Exhaust System) |
| Condition | 100% New |
| Purpose | For retrofit / upgrade & repair |
| Car Make | Model Cars |
| Origin | Shandong, China |
| Warranty | 1 Years Manufacturer Warranty |
3. Why This Solves Real Problems
1. 2.5″ Universal Catalytic Converter Resolves Emission Test Failures
Restores factory-level $\text{CO}/\text{HC}/\text{NO}_x$ conversion, helping gasoline vehicles easily pass mandatory local smog checks and strict OBDII environmental compliance tests.
2. Aging Exhaust Systems
Prevents recurring check engine lights and P0420 codes caused by degraded or melted substrates, providing a durable structural replacement that extends exhaust system lifespan.
3. Performance Degradation
The optimized 400 CPSI high-flow design eliminates internal exhaust blockages, reducing backpressure so the engine breathes smoothly, recovering original horsepower and fuel efficiency.
4. Costly Repairs
Equipped with a pre-welded O2 sensor port and precision-engineered 2.5-inch inlets/outlets, minimizing alignment adjustments during installation and saving valuable shop labor costs.
4. Endorsed by Industry Experts
“This unit’s 400 CPSI high-performance substrate balances flow velocity and surface catalytic area perfectly. For workshops dealing with Euro V compliance issues, it’s a highly reliable aftermarket solution.”
– Mike R., Master Technician (ASE Certified)
“The high-grade 409L stainless steel casing and integrated aluminized shielding handle thermal stress exceptionally well. No lambda sensor errors post-installation, which shows excellent calibration.”
– Dr. Elena K., Emissions Engineer, SAE Member
5. Compatibility & Applications
Perfect For:
High-mileage gasoline automotive platforms requiring front-position catalyst replacement.
Regions enforcing strict Euro 4 / Euro V vehicle emissions inspections.
Drivers looking for a high-flow retrofit/upgrade to improve exhaust scavenging.
Fleet operators requiring durable, OBDII-compliant exhaust system overhauls.
6. Quality Validation
ISO 9001 Certified Manufacturing Process – Premium automotive management standards.
OBDII & Euro V Compliant Core – Validated environmental standard filtration.
Magnetic Leak Test – 100% inspected to ensure zero gas bypass.
X-Ray Weld Inspection – Structural joint integrity guaranteed under high pressure.
7. Pricing & Logistics
Package Type: Protective Plastic bag + Inner Carton / Secure Wooden box (Tailored to your requirement).
MOQ: 1 piece (Supports sample testing and volume distribution orders).
Lead Time / Delivery: 7–15 Days (Fast factory dispatch based on order scale).
Quality Assurance: 100% comprehensive inspection passed before packing.
Warranty Support: 1-Year manufacturer warranty with dedicated after-sales tracking.
8. The 3waycatalyst Advantage
1. Performance Assurance
Highly optimized washcoat loading for steady Euro 4/5 pollutant conversion.
400 CPSI cell configuration balances maximum flow with legal emission control.
Restores factory engine efficiency and smooth acceleration characteristics.
2. Hassle-Free Installation
Pre-welded O2 sensor port ensures plug-and-play sensor integration.
Precise 2.5″ (63.5mm) inlet/outlet matching standard automotive exhaust lines.
Zero programming required—fully compatible with stock engine control modules.
3. Compliance Commitment
Euro V and OBDII certified performance structures.
High-grade raw materials engineered for continuous high-temperature reliability.
1-Year structural and catalytic integrity guarantee.
9. Real-World Impact
Case 1: High-Mileage Gasoline Sedan
Issue: Failed regional emissions test due to worn-out factory catalyst (High HC & CO readings).
Solution: Installed our 409L stainless steel front catalytic converter.
Result: Passed the emission re-test with margin; check engine light permanently cleared.
Case 2: Custom Exhaust Upgrade (L4 Engine)
Symptom: Noticeable exhaust backpressure restriction and flat throttle response after high-rpm driving.
Action: Replaced clogged catalyst with 2.5″ Universal Catalytic Converter
Outcome: Recovered lost throttle response, improved exhaust tone, and stabilized sensor metrics without triggering error codes.
Detailed Technical Specifications & Flow Data Sheets
Volume Discounts and Wholesale Distributor Pricing
Global Shipping and Customized Packaging Solutions
24/7 Expert Engineering & After-Sales Support
