Walker 84598 Catalytic Converter

Walker CalCat 84598 Catalytic Converter

Walker CalCat 84598 is a direct-fit catalytic converter built for CARB-compliant replacement on select Acura TSX applications. It uses an OE-style layout with welded 3-bolt flanges, a round stainless steel body, and a ceramic substrate for a precise fit on the listed vehicles.

Walker CalCat is the Walker product line focused on CARB-certified replacement converters for OBDII and non-OBD vehicles. This direct-fit design is engineered to match factory-style exhaust routing and emissions requirements for the covered Acura TSX model years.

Key Features

• CARB certified for sale and use in California and other CARB-compliant states
• Direct-fit, specific-fit design for listed Acura TSX applications
• Stainless steel body with ceramic substrate
• 3-bolt welded flange inlet and outlet for OE-style connection points
• Midbed oxygen sensor location
• Round converter body with 18.875-inch overall length
• Walker part number 84598 for catalog and fitment lookup

Fitment Details

• Fits 2008 Acura TSX, N/A — CARB Executive Order D-182-74; Engine Family Number (EFN) 8HNXV02.4FKC; legal for sale and use in California and other states requiring CARB-compliant replacement converters; exhaust gasket is recommended; additional parts needed to complete installation: 31644 and 31369; direct fit type; CalCat.
• Fits 2007 Acura TSX, N/A — CARB Executive Order D-182-74; Engine Family Number (EFN) 7HNXV02.4HKC; legal for sale and use in California and other states requiring CARB-compliant replacement converters; exhaust gasket is recommended; additional parts needed to complete installation: 31644 and 31369; direct fit type; CalCat.
• Fits 2006 Acura TSX, N/A — CARB Executive Order D-182-74; Engine Family Number (EFN) 6HNXV02.4FKC; legal for sale and use in California and other states requiring CARB-compliant replacement converters; exhaust gasket is recommended; additional parts needed to complete installation: 31644 and 31369; direct fit type; CalCat.
• Fits 2005 Acura TSX, N/A — CARB Executive Order D-182-74; Engine Family Number (EFN) 5HNXV02.4KBP; legal for sale and use in California and other states requiring CARB-compliant replacement converters; exhaust gasket is recommended; additional parts needed to complete installation: 31644 and 31369; direct fit type; CalCat.
• Fits 2004 Acura TSX, N/A — CARB Executive Order D-182-74; Engine Family Number (EFN) 4HNXV02.4AKC; legal for sale and use in California and other states requiring CARB-compliant replacement converters; exhaust gasket is recommended; additional parts needed to complete installation: 31644 and 31369; direct fit type; CalCat.

What It Helps Fix

• Failed emissions testing on covered Acura TSX models
• Check engine light concerns related to catalyst efficiency
• Restricted exhaust flow caused by a worn or damaged converter
• Exhaust leaks at the converter connection points
• CARB compliance issues when replacing the original converter

Installation Notes

Verify the vehicle year, engine family number, and emissions requirements before installation. This Walker 84598 converter uses 3-bolt welded flanges and a midbed oxygen sensor location, so matching the factory exhaust configuration is important. An exhaust gasket is recommended, and the listed additional parts should be confirmed before beginning the repair.

For search and catalog reference, Walker 84598 is the direct-fit CARB replacement converter for select 2004-2008 Acura TSX applications. It is also a fitment-based search match for Acura TSX catalytic converter replacement needs in CARB-regulated states.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the listed applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.