MagnaFlow California Grade Left Direct-Fit Catalytic Converter - Nissan Titan / Infiniti QX56 2004

MagnaFlow 4593218 is the California Grade replacement for the driver side downstream converter, a spun body direct-fit unit built from 16 gauge 409 stainless steel with a ceramic substrate and a single laser fusion weld that limits leak paths. It measures 29 inches overall, carries one oxygen sensor port ahead of the catalyst and no air tube, and bolts up at both flanges with no cutting or welding. CARB Executive Order D-193-188 covers it for registered use in California and the other CARB states. One flange gasket, one crush ring, two washers, two bolts and two nuts ship in the box, so corroded factory hardware does not have to be reused.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy