MagnaFlow 51578 Direct-Fit OEM Catalytic Converter for09-14 GM 2.5in

Vehicle Fitment

• 2009-2014 Chevrolet Silverado 1500 (V6/V8), 4.3L/4.8L/5.3L/6.0L
• 2009-2014 Chevrolet Tahoe/Suburban 1500 (V8), 4.8L/5.3L
• 2009-2014 GMC Sierra 1500 (V6/V8), 4.3L/4.8L/5.3L/6.0L
• 2009-2014 GMC Yukon/Yukon XL 1500 (V8), 5.3L/6.0L
• 2010-2013 Cadillac Escalade (V8), 6.0L
• 2009-2013 Chevrolet Avalanche (V8), 5.3L/6.0L

Features

• OEM grade direct-fit catalytic converter for GM full-size trucks and SUVs
• Designed for exact factory replacement with minimal modifications
• Stainless steel spun body for enhanced corrosion resistance
• Mandrel-bent tubing to improve exhaust flow and reduce restrictions
• EPA-compliant for vehicles built to Federal emissions standards
• Oxygen sensor ports pre-positioned for factory O2 sensor locations
• Uses factory hangers for proper under-vehicle alignment
• Includes essential gasket and band clamp for secure installation

Specifications

• Part Number: 51578
• Converter Type: Direct-Fit OEM Grade
• Inlet Diameter: 2.50 in (bolt-on)
• Outlet Diameter: 2.50 in (clamp-on)
• Body Material: Stainless steel
• Substrate Material: Ceramic
• Oxygen Sensor Ports: Pre and post converter (4 total)
• Overall Length: 45 in
• Heat Shield: None
• CARB Certification: Not CARB certified (Federal/EPA only)
• Installation Type: Direct bolt-on (no cutting/welding required)

Included Components

• 1x MagnaFlow 51578 OEM Grade Direct-Fit Catalytic Converter
• 1x Gasket
• 1x Band Clamp
• (Factory hangers used; additional hardware not included)

Product Description

The MagnaFlow 51578 OEM Grade Direct-Fit Catalytic Converter is engineered as a high-quality replacement for select 2009-2014 GM full-size truck and SUV applications. Designed to replicate original equipment fitment, this converter fits directly into the stock exhaust system using the factory hangers and pre-located oxygen sensor ports so you avoid cutting or welding during installation. Its stainless steel spun body and mandrel-bent tubing help maintain exhaust flow similar to OE performance while offering enhanced corrosion resistance.

Meeting Federal/EPA emissions standards for vehicles registered outside California and other CARB states, the 51578 helps keep your vehicle emissions compliant and can prevent check engine lights related to a failed catalytic converter. This OEM-grade design includes the necessary gasket and band clamp to help ensure a proper seal. Note that this converter is not CARB certified for California, Colorado, New York, Maine, or other states with CARB emissions requirements - always check local emissions regulations before purchasing.