MagnaFlow California Grade Left Catalytic Converter - Nissan 370Z / Infiniti G37 / Q50 2007-2018 - 551143

MagnaFlow's California Grade converter is a CARB compliant replacement for the driver side converter on the VQ series V6 and bolts into the factory location without cutting or welding. The 19.25 in body carries an attached aluminized steel heat shield over a ceramic substrate, built from 16 gauge 409 stainless steel tubing with 308 stainless steel MIG welds, with flange inlet and outlet connections and one post converter oxygen sensor port. OE sized barbed 410 stainless steel hangers ship in the box along with a crush ring gasket, a flange gasket, six flat washers, four bolts, and four nuts. CARB Executive Order D-193-200 makes it legal for installation in all 50 states.

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