MagnaFlow 5451309 California Grade Universal Catalytic Converter 4in - GMC Sierra 1500, Chevrolet Silverado 2500HD, Chevrolet Express 2500 (2006-2010)

MagnaFlow California Grade universal catalytic converter (5451309) for GMC Sierra 1500 + more (2006-2010). It has a 4in inlet and outlet. Stainless steel construction with a ceramic substrate for corrosion resistance and long service life. CARB compliant (EO D-193-143); 50-state legal. Universal design — cutting and welding required to install.

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