Walker® 83177 - CalCat™ Direct Fit Round Body Catalytic Converter

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  • Additional Parts Needed: 31556.
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Product Details

Walker Exhaust Parts

CalCat™ Round Body Catalytic Converter (83177) by Walker®. With O2 Sensor Port. Emissions: CARB compliant. Location: Front. This catalytic converter is constructed specially for your vehicle to directly replace the original equipment part and comes ready to install. The part is designed to meet EPA and California Emissions Requirements. This converter is CARB compliant and is legal in California.

Notes: Additional Parts Needed: 31556.

Walker - Catalytic ConvertersWalker - VideosWalker - About


Emissions: CARB compliant
Location: Front
Catalytic Converter Series: CalCat™
Catalytic Converter Substrate Material: Ceramic
Converter Configuration: Direct Fit
Converter Body Material: Stainless Steel
Catalytic Converter Oxygen Sensor Port: Yes
Catalytic Converter Oxygen Sensor Location: Pre and Post Catalytic Converter
Catalytic Converter Width: 4.125"
Catalytic Converter Body Height: 4.125"
Catalytic Converter Body Length: 4.75"
Catalytic Converter Overall Length: 16.58"
Catalytic Converter Body Shape: Round
Inlet Quantity: 1
Outlet Quantity: 1
Inlet Connection Type: 4 Bolt Welded Flange
Outlet Connection Type: 3 Bolt Welded Flange
Connection Type: 4 Bolt Welded Flange


  • Designed to meet your vehicle’s specific emissions requirements
  • Direct fit replacement
  • Includes all applicable flanges, hangers, and sensor fittings
  • Features the right loading of precious metals & proprietary washcoat technology
  • Body and pipe heat shields made of high quality materials
  • Easy, bolt-on installation without cutting or welding
  • Approved for sale and use in California
  • Covered by 5 years/50,000 miles emissions and structural warranty


  • Installer Card
  • Warranty Card
  • Inlet Gasket

For safety and legal reasons, a faulty catalytic converter can’t be ignored. The catalytic converter does the job of transforming toxic gases into less harmful compounds and a malfunctioning converter could cause poor vehicle performance and/or a failed emissions test. If you need a direct fit catalytic converter, Walker has a wide range of direct replacements for OE converters that will require no modifications to install. Walker's parts fit like OE because Walker is the catalytic converter supplier to many vehicle manufacturers. Catalytic converters by Walker are designed with an ample precious metal loading to ensure the required reduction of emissions is achieved. They are constructed and manufactured to satisfy all EPA and California policy and emission control requirements.

This part is built for your specific make and model, has the same dimensions as OE part, and bolts directly to existing exhaust. The converter has thick OE-style flanges for greater strength and OE-style routing for straightforward installation. Hangers and sensor fittings are included if required by application. It features the proper catalyst material and design along with a high-technology washcoat, which guarantees better oxygen storage capacity. The part complies with the California Air Resource Board (CARB) regulations, so sale and usage in this state is legal. This catalytic Converter is backed by 5 years/50,000 miles catalytic performance and structural integrity warranty.

Walker® is the world's leading manufacturer of automotive exhaust systems and emission control products for the replacement and OE markets. It offers complete engine-to-tailpipe exhaust solutions and exploits modern emission control technologies that fully satisfy the needs of the automotive industry. Walker has introduced a long line of innovations that revolutionized the market and set new standards for quality and durability. The louvered tube, stainless steel muffler, and forerunners of today's catalytic converters were the industry 'firsts' developed by Walker. It is also the first aftermarket manufacturer that offered a Limited Lifetime Warranty for the professional installer. Walker®, an industry leader in emissions control products, offers a complete line-up to meet all customer needs! World-class, engine-to-tailpipe exhaust solutions for domestic and import vehicles. Walker has everything from brackets and hangers, to clamps and gaskets - all the accessories you need to do the complete exhaust job. Walker is your one-stop exhaust shop, offering a full line of accessories.

Part Number:

Warranty Information

Limited Lifetime Warranty

Walker warrants qualifying exhaust products against defects and wear-out when used on private passenger cars and light trucks under normal operating conditions for as long as such original purchaser owns the vehicle on which they were originally installed.

Tenneco's obligation under this warranty is limited to replacement of the worn-out or defective product with the same product in accordance with this warranty. Cost of removal and installation are not included, and any incidental and consequential damages are excluded under this warranty, regardless of when the failure occurs. This warranty has no cash value. This warranty does not apply to products which have been modified, improperly applied or installed on vehicles used for commercial or racing purposes.

To make a claim under this warranty, return the worn-out or defective product with the dated original receipt to the dealer or retailer from whom it was purchased or to a Tenneco dealer for verification and exchange under this warranty.

This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. Any implied warranties you may have under state law are limited to the same duration as this warranty. Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations and exclusion may not apply to you.

Walker® CalCat® Converters covered by 5-Year / 50,000 Miles Emissions Warranty and Warranty on Structural Components

Walker® Ultra® Converters covered by 25,000 Miles Emissions Warranty and 5 Years / 50,000 miles Warranty on Structural Components

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

2009 Acura TSX
  • Engine Family Number 9HNXV02.44B9
  • This part is CARB compliant.
2009 Acura TSX
  • This part is CARB compliant
  • Engine Family Number 9HNXV02.44B9
2009 Honda Accord
  • Engine Family Number 9HNXV02.4YB3 2.4L
  • This part is CARB compliant.
2009 Honda Accord
  • 2.4L
  • This part is CARB compliant
  • Engine Family Number 9HNXV02.4YB3
2008 Honda Accord
  • Engine Family Number 8HNXV02.4TKR 2.4L
  • This part is CARB compliant.
2008 Honda Accord
  • 2.4L
  • This part is CARB compliant
  • Engine Family Number 8HNXV02.4TKR

Product Reviews


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Walker® - CalCat™ Front Direct Fit Catalytic Converter
Walker® 83177 - CalCat™ Direct Fit Round Body Catalytic Converter
Average Rating: 5 of 5
5 of 5
Walker Cat for 2009 Honda Accord
Walker® - Front Direct Fit Catalytic Converter
I had a great experience ordering for the first time on CARiD. The part fit and I had no problems installing the new Cat.
GPosted by (Fontana, CA) /
2009 Honda Accord
Was this review helpful for you? Yes

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