SKU: 51299 | UPC: 888563181257
MagnaFlow 3.00″ Center/Center 6″ Spun Body Universal Catalytic Converter
The MagnaFlow 3.00″ Center/Center 6″ Spun Body Universal Catalytic Converter is a compact, high-flow emissions solution ideal for custom exhaust builds, turbo applications, engine swaps, and replacement of failed factory catalytic converters. Its short 6-inch spun stainless steel body with true 3.00-inch center-to-center inlet and outlet placement makes it perfect for tight chassis layouts where longer converters won’t fit.
The premium metallic substrate provides rapid light-off, excellent efficiency, and supports power levels well beyond 500 horsepower with minimal restriction. Ribbed body construction reduces thermal expansion stress, while heavy-duty 409 stainless steel with seam-welded necks ensures long-term durability under high exhaust gas temperatures.
This 49-state legal (EPA compliant) converter is a go-to choice for fabricators and performance shops needing a reliable, high-flow catalytic converter that meets emissions standards without sacrificing performance.
Key Features
- 3.00″ Inlet/Outlet – Full 3-inch mandrel-bent necks for unrestricted flow and easy welding
- Compact 6″ Body Length – Fits tight engine bays and custom applications where space is limited
- Center/Center Configuration – Straight-through design simplifies alignment
- Spun Metallic Substrate – Faster light-off and higher efficiency than ceramic cores
- Ribbed Body Construction – Reduces thermal expansion and prevents substrate damage
- 409 Stainless Steel – Fully welded for corrosion resistance and durability
| Spec | Detail |
|---|---|
| Part Number | 51299 |
| Brand | MagnaFlow |
| Type | Universal Catalytic Converter |
| Inlet/Outlet Diameter | 3.00 inches (Center/Center) |
| Body Length | 6 inches |
| Material | 409 Stainless Steel with Metallic Substrate |
| Emissions Compliance | 49-State Legal (EPA) – Not legal for sale or use in California or CARB states |
| Warranty | 5-Year/50,000-Mile External Construction; 25,000-Mile Internal Catalyst |
Whats Included
- One MagnaFlow 51299 3.00″ Center/Center 6″ Spun Catalytic Converter
Product Notes
- 49-State EPA compliant – NOT legal for sale or use in California or CARB-adopting states
- For OBD-II vehicles, proper oxygen sensor placement (before and after converter) is required
- No heat shield included – a wrap or shield is recommended for under-car applications
- Professional welding required for installation
Installation Notes
- Cut section of exhaust and weld converter in place
- Maintain 1–2 inches clearance from heat-sensitive components
- Ensure downstream O2 sensor is positioned after the converter
- Allow converter to reach operating temperature during drive cycle before emissions testing
This Part Fits
Universal fit designed for custom and performance exhaust systems requiring a 3-inch, 49-state legal catalytic converter. Commonly used on turbocharged imports and domestics, high-horsepower V8 swaps, classic cars, hot rods, and off-road/race vehicles registered in non-CARB states.
Why Choose MagnaFlow Universal Catalytic Converters?
- Over 40 years of catalytic converter engineering and manufacturing in the USA
- Premium metallic substrates for maximum flow and longevity
- Industry-leading warranty and dyno-proven performance
Frequently Asked Questions
- Q: Is this converter legal in California?
A: No, this is a 49-state EPA converter. California and CARB states require CARB EO-approved units. - Q: Can I use this on an OBD-II vehicle?
A: Yes, provided the downstream O2 sensor is positioned after the converter for proper ECU function. - Q: What power level can this converter support?
A: It easily supports 500+ horsepower with proper tuning and exhaust design.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Heavy-duty box with foam protection
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