KAX Rear Catalytic Converter Fits 2004-2008 Maxima & 2002-2006 Altima

In this review the KAX 1PC Rear Catalytic Converter is judged as a practical, budget-focused replacement for owners of specific Nissan V6 models. It is aimed at drivers who need a compliant, direct-replacement-style unit that restores emissions control without a high aftermarket premium. The single biggest reason to consider this unit is its EPA compliance and precious-metal coated substrate, which promise reliable conversion of toxic gases and a service life aligned with emissions standards.

Key Features

• Fitment: Designed to fit 2004-2008 Maxima SE/SL/SE, 2002-2006 Altima SE/SL and 2004-2006 Quest S/SL/Base, making selection straightforward for those model years.
• EPA Compliant: The unit passes stated EPA inspection standards, which supports emissions legality in permitted states and implies a designed minimum service life.
• Advanced Materials: Coated with palladium, platinum and rhodium to improve flowability and help convert CO, HC and NOx more effectively than an uncoated substrate.
• Environmental Benefit: Marketed for energy efficiency and cleaner exhaust, so installing it can help reduce local airborne pollutants from the vehicle.
• Value Proposition: Offers a lower-cost alternative to OE-level parts while targeting the same core function of restoring catalytic performance.

Who It's For

The converter is best for owners of the listed Nissan Maxima, Altima and Quest models who need an EPA-compliant replacement and are shopping on value rather than OEM branding. It suits installers and independent shops that can adapt hardware if minor alignment or attachment differences arise.

It is not ideal for buyers in states where the item does not ship, or for vehicles that require an exact OEM fit without any adjustment. Customers who need guaranteed perfect alignment and complete hardware kits with every part included may want to consider OEM or matched aftermarket alternatives.

Pros & Cons

Pros

• EPA compliance and precious-metal coating deliver dependable emissions conversion and legal conformity in approved states.
• Compatible with multiple Nissan V6 applications, reducing search time for the correct rear converter.
• Competitive price relative to many OEM replacements, providing good value for budget-conscious repairs.
• Materials and construction aim to extend service life and improve exhaust cleanliness.

Cons

• Some customers report fit and alignment variation, including O2 bung location issues, which may require modification or extra shop time.
• Hardware quality is inconsistent according to buyer feedback, with missing bolts or gaskets reported in some cases.

Specifications

Product type	Rear catalytic converter
Compatible engines	3.5L V6 applications listed
Fitment years/models	2004-2008 Maxima; 2002-2006 Altima; 2004-2006 Quest
Compliance	EPA compliant; not CARB compliant
Substrate coating	Palladium, platinum and rhodium
Warranty claim	Meets stated EPA service-life expectations

Our Verdict

The KAX rear catalytic converter is a pragmatic choice for owners of the specified Nissan models who need an EPA-compliant, lower-cost replacement that restores emissions function. It offers material quality and stated longevity that make it good value, but buyers should budget for possible minor fitment adjustments or additional hardware if needed.

Frequently Asked Questions

Does this converter ship to all states?
No. The item does not ship to California, Colorado, New York or Maine due to regulatory restrictions.

Will this unit fit my 3.5L Maxima exactly like OEM?
It is designed for the listed Maxima years and trims, but some buyers report alignment or O2 bung location differences that can require adjustment.

Is this CARB compliant for strict emissions states?
No. The product is EPA compliant but not CARB compliant, so it is not suitable where CARB certification is required.