MagnaFlow Direct-Fit California OBDII Catalytic Converters

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Fitment Info

  • CARB OBDII Catalytic Converters
  • Closely welded seam
  • Direct fit design
  • Easy to install
  • Stainless steel construction
  • 5-year/50,000 mile limited warranty
  • Made in the USA

Our #1 value is customer service.

We believe in doing right by our customers, no matter what it takes.

In keeping with that, we offer a “perfect fit guarantee” that ensures your satisfaction on 3 levels: low price, free shipping, and perfect fitment.

- Alan Marek, Founder of

The Lowest Price Anywhere--Guaranteed

At PartCatalog, we’ll beat any competing vendor’s price. And we’re so confident in our rock-bottom prices that we’ll refund the difference if you find a lower price elsewhere.

Free Shipping Both Ways

Our “free shipping both ways” policy means that returns and orders ship free of charge. When you place an order, you pay only the list price and any applicable taxes. We cover the shipping to save you money and ensure timely delivery.

100% Guaranteed to Fit

In the highly unlikely event of a fitment problem, we’ll return your purchase at no cost to you. We pay return shipping on all orders, so it won’t cost you a penny to send back a defective part.


  • California CARB compliant catalytic converter for OBD 2 vehicles
  • Closely welded seam holds the catalyst in place and prevents its from loosening and shifting
  • Monolithic honeycomb catalyst design improves internal surface area
  • Ribbed heat shield provides a stable and rigid wall for heat protection
  • Designed for a perfect fit on your vehicle's specific model
  • Easy to install with no welding or cutting
  • Made with tough and rust-resistant steel for super strength and durability
  • MagnaFlow's 5-year/50,000 mile guarantee of excellent quality and performance
  • Made in the USA with local materials and technology
CARB OBDII Catalytic Converters

CARB OBDII Catalytic Converters

The MagnaFlow California OBDII catalytic converter complies with the CARB requirements and can be used by vehicle owners in the state. The cat converts toxic exhaust fumes to less harmful emissions. It also helps keep your engine and exhaust system in an optimal state for maximum performance.

Closely Welded Seam

Closely Welded Seam

It features a closely welded seam that creates a strong bond between the catalyst and the wall. It ensures that the catalyst stays intact and does not loosen and shift inside the converter.

Monolithic Honeycomb Catalyst Design

Monolithic Honeycomb Catalyst Design

The converter has a monolithic honeycomb design for the catalyst. It increases the exhaust flow surface area for maximum conversion even with high exhaust volumes.

Ribbed Heat Shield

Ribbed Heat Shield

The MagnaFlow California OBDII catalytic converter also has a ribbed heat shield that provides a rigid wall for heat protection. It creates a stable structure to contain the hottest exhaust fumes.

Direct Fit Design

Direct Fit Design

It is designed for a perfect fit on your vehicle's exact model. Click the blue button above to find this for your vehicle application.

Easy to Install

Easy to Install

The cat is easy to install. As its a direct fit, it is designed with funneled inlets and outlets to help fit perfectly on your vehicle model. You won't need to weld or cut it.

Stainless Steel Construction

Stainless Steel Construction

The MagnaFlow California OBDII catalytic converter is made with premium-grade stainless steel that won't rust, oxidize or corrode. It stays firm for years and takes all the heat to maintain its hold.

5-year/50,000 Mile Limited Warranty

5-year/50,000 Mile Limited Warranty

The manufacturer provides a 5-year or 50,000-mile limited warranty for every purchase of the Magnaflow universal California OBDII catalytic converter. This is a guarantee of quality and performance beyond the ordinary. If you need help with your warranty or you would like further information, feel free to reach out to PartCatalog.

Made in the USA

Made in the USA

The cat is proudly made in the USA with a local labor force, raw materials, and technology. Your purchase not only helps to support local businesses but also creates jobs for thousands of Americans every year.

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This product comes with the manufacturer's limited warranty.
Part Numbers

The following part numbers are available in this product line:

4451285, 4451295, 4451413, 4451420, 4451453, 4451627, 447321, 4481033, 4481148, 4481161, 4481177, 4481222, 4481228, 4481266, 4481284, 4481409, 4481451, 4481473, 4481489, 4481617, 4481639, 4481641, 4481659, 4481692, 4481699, 4481882, 4481988, 4551018, 4551020, 4551028, 4551419, 4561052, 4561062, 4561333, 4561396, 5411012, 5411026, 5411031, 5411050, 5411466, 5421094, 5421269, 5421270, 5421623, 5421708, 5421784, 5451217, 5451686, 5451687, 5451694, 5451760, 5461110, 5461132, 5461166, 5461195, 5461225, 5461227, 5461229, 5461241, 5461244, 5461396, 5461619, 5461733, 5461734, 5461768, 5461976, 5461996, 551129, 551197, 551438, 551619, 551753, 5561070, 5561100, 5561140, 5561161, 5561172, 5561241, 5561423, 5561585, 5561619, 5561676, 5561848, 5561882, 557109, 5571091, 5571374, 5571543, 5571653, 5571890, 557229, 5581578, 5581668, 5581706, 5581744, 5581947, 5591099, 5591184, 5591529, 57207

To purchase this product for your vehicle, please select the Year, Make and Model of your vehicle at the top of this page.

Acura (1996-2012)

CL, Integra, MDX, RDX, RL, RSX, TL, TSX

Audi (1996-2010)

A4, A4 Quattro, A6, A6 Quattro, A8, A8 Quattro, Allroad Quattro, Q7, S4, TT

BMW (1996-2010)

318i, 318is, 318ti, 328i, 328is, 335i, 335xi, 528i, 528i xDrive, 528xi, 535i, 535i xDrive, 535xi, 540i, 740iL, 840Ci, 850Ci, M3, M5, Z3, Z4

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Hummer (2003-2008)


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G20, G35, I30, I35, J30, M35, QX4

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Land Rover (2003)


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