Walker 83264 Catalytic Converter - Rear

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat 83264 is a direct-fit catalytic converter built for specific vehicle applications and engineered to meet CARB compliance requirements. It is designed for the rear position on select 2004-2006 Nissan Altima models, with OE-style fitment for a cleaner replacement path.

Walker CalCat is the brand line for CARB-compliant replacement converters from Walker, covering both OBDII and non-OBD applications. This line focuses on precise fit and emissions compliance for vehicles that require a direct-fit catalytic converter replacement.

Key Features

• Direct-fit catalytic converter for specific applications
• CARB certified for sale and use in California and other CARB-requiring states
• Stainless steel body construction
• Ceramic substrate material
• Round body shape with 2-bolt welded flange inlet and outlet
• Rear position fitment for select Nissan Altima models
• OE-style dimensions for installation alignment
• Oxygen sensor location: pre-catalyst

Fitment Details

• Fits 2006 Nissan Altima, rear. CARB Executive Order D-182-63; Engine Family Number 6NSXV02.5G5A; legal for sale and use in California and other states requiring CARB-compliant replacement converters; additional parts needed to complete installation: 31658 and 31540; direct fit type; CalCat.
• Fits 2005 Nissan Altima, rear. CARB Executive Order D-182-63; Engine Family Number 5NSXV02.5G5A; legal for sale and use in California and other states requiring CARB-compliant replacement converters; additional parts needed to complete installation: 31658 and 31540; direct fit type; CalCat.
• Fits 2004 Nissan Altima, rear. CARB Executive Order D-182-63; Engine Family Number 4NSXV02.5G5A; legal for sale and use in California and other states requiring CARB-compliant replacement converters; additional parts needed to complete installation: 31658 and 31540; direct fit type; CalCat.

What This Part Helps Address

• Failed catalytic converter emissions testing
• Check engine light concerns related to catalyst efficiency
• Exhaust restriction caused by a worn or damaged converter
• Replacement needs for CARB-regulated vehicle applications
• Fitment issues from non-direct replacement exhaust parts

Installation Notes

Verify the vehicle year, make, model, rear position, and engine family number before ordering. This Walker 83264 converter uses 2-bolt welded flange connections and is built as a specific-fit replacement, so matching the existing exhaust layout is important. Additional parts are listed for installation on the confirmed fitment applications.

This part cross-references AP Exhaust 754295 for the same application.

Quality Assurance

Walker states that CalCat converters are designed, tested, and validated to meet CARB standards and deliver OE-style fitment for the listed applications. Walker 83264 is CARB certified for the confirmed Nissan Altima fitments shown above.