Z33Seller listing
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View listing at Z1 Motorsports; opens in a new tab350Z/G35 · Buyer's guide
350Z Catalytic Converters: VQ35DE vs VQ35HR and Federal vs California Rules
US-spec 2003-2008 Nissan 350Z; engine-specific DE and HR converter paths; emissions legality is vehicle/test-group and jurisdiction specific.
Current seller options
WHERE TO BUY
Open an exact listing, then confirm fitment, stock, price, and shipping with the seller before ordering.
Seller links checked . Prices and availability can change.
Z33Seller listing
Listed priceSee seller for current price
View listing at Z1 Motorsports; opens in a new tabZ33Seller listing
Listed priceSee seller for current price
View listing at Z1 Motorsports; opens in a new tabZ33Seller listing
Listed priceSee seller for current price
View listing at Z1 Motorsports; opens in a new tabZ33Seller listing
Listed priceSee seller for current price
View listing at Importpartspro; opens in a new tabWhat you need to know
Separate 2003-2006 VQ35DE from 2007-2008 VQ35HR. Match side, flange, oxygen-sensor arrangement, emissions label/test group, and state law. Federal/EPA-compliant wording is not a California approval. Diagnosis should address the failure cause before replacing a converter.
OEM numbers
No universal converter number is claimed. The checked direct-fit/performance listings are explicitly separated into VQ35DE and VQ35HR applications. California legality requires an exact CARB Executive Order application for the vehicle test groupnone of the checked high-flow paths is presented as California legal.Supersession
No OEM supersession chain is claimed. Manufacturer SKUs and CARB EO applications must be verified on the exact current product and vehicle test group.
Fitment
Separate 2003-2006 VQ35DE from 2007-2008 VQ35HR. Match side, flange, oxygen-sensor arrangement, emissions label/test group, and state law. Federal/EPA-compliant wording is not a California approval. Diagnosis should address the failure cause before replacing a converter.
Aftermarket options
Checked 49-state/EPA and performance paths include Kinetix, Berk, aFe, MagnaFlow, and an HR Berk listing. California buyers should use OE or a CARB database-confirmed exact EO application; off-road wording is not a street-legal substitute.
Before you buy
Emissions law is location and vehicle specific. None of the checked high-flow pages is claimed California legal. Confirm engine, side, emissions label/test group, and an exact current CARB EO where required. A catalog or Add to Cart control is not guaranteed inventory.
Research and fitment sources
Supersede reviewed 9 unique research sources for this guide. 5 also appear above as a seller or official action and are not repeated here; 4 additional citations follow.
Research last verified .