# MagnaFlow 51878 Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD) for 2001-2007 Cadillac Escalade and More ### Performance Overview The Magnaflow OEM Grade Catalytic Converters are the perfect replacement for your stock converter. They are crafted from high-quality stainless or aluminized steel for maximum durability. They are seam-welded for unbreakable bonds with no risk of vibrations. The catalytic converters are available with a lap inserted in the point where the neck meets the catalytic converter body. The neck is carefully formed to be sure that it doesn't reach the body where it can cause trouble to the exhaust flow. As an additional safety feature, the Catalytic Converter has a heavy duty heat shield to protect it against extreme heat and give additional stability. ### Key Features - Brand: MagnaFlow - Part number: 51878 - Product type: Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD) - Designed for compatible vehicle applications listed on this page ### Vehicle Fitment - 2002 Cadillac Escalade, Note: Base; 6.0L; 2.50"; 2.50" - 2003 Cadillac Escalade, Note: Base; 6.0L; 2.50"; 2.50" - 2004 Cadillac Escalade, Note: Base; 6.0L; 2.50"; 2.50" - 2005 Cadillac Escalade, Note: Base; 6.0L; 2.50"; 2.50" - 2006 Cadillac Escalade, Note: Base; 6.0L; 2.50"; 2.50" - 2003 Cadillac Escalade Esv, Note: Base; 6.0L; 2.50"; 2.50" - 2004 Cadillac Escalade Esv, Note: Base; 6.0L; 2.50"; 2.50" - 2005 Cadillac Escalade Esv, Note: Base; 6.0L; 2.50"; 2.50" ### FAQ **Will this fit my vehicle?** Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase. **What part number is this?** The listed part number is 51878. **Is this product designed for direct replacement?** Yes. This product is intended to match compatible vehicle applications listed in the fitment section. **Should I confirm fitment before ordering?** Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering. ### Common Searches - Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD) for Cadillac Escalade - 51878 fitment - MagnaFlow Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD) - 2001 Cadillac Escalade Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD) ### Vehicle Fitment Table Year Make Model Position Fitment Precision Note 2002 Cadillac Escalade Base; 6.0L; 2.50"; 2.50" 2003 Cadillac Escalade Base; 6.0L; 2.50"; 2.50" 2004 Cadillac Escalade Base; 6.0L; 2.50"; 2.50" 2005 Cadillac Escalade Base; 6.0L; 2.50"; 2.50" 2006 Cadillac Escalade Base; 6.0L; 2.50"; 2.50" 2003 Cadillac Escalade Esv Base; 6.0L; 2.50"; 2.50" 2004 Cadillac Escalade Esv Base; 6.0L; 2.50"; 2.50" 2005 Cadillac Escalade Esv Base; 6.0L; 2.50"; 2.50" 2006 Cadillac Escalade Esv Base; 6.0L; 2.50"; 2.50" 2002 Cadillac Escalade Ext Base; 6.0L; 2.50"; 2.50" 2003 Cadillac Escalade Ext Base; 6.0L; 2.50"; 2.50" 2004 Cadillac Escalade Ext Base; 6.0L; 2.50"; 2.50" 2005 Cadillac Escalade Ext Base; 6.0L; 2.50"; 2.50" 2006 Cadillac Escalade Ext Base; 6.0L; 2.50"; 2.50" 2004 Chevrolet Silverado 1500 Ls, Lt; 6.0L; 2.50"; 2.50" 2005 Chevrolet Silverado 1500 Ls, Lt; 6.0L; 2.50"; 2.50" 2006 Chevrolet Silverado 1500 Lt; 6.0L; 2.50"; 2.50" 2001 GMC Sierra 1500 C3; 6.0L; 2.50"; 2.50" 2002 GMC Sierra 1500 Denali; 6.0L; 2.50"; 2.50" 2003 GMC Sierra 1500 Denali; 6.0L; 2.50"; 2.50" 2004 GMC Sierra 1500 Denali; 6.0L; 2.50"; 2.50" 2005 GMC Sierra 1500 Denali, Sle, Slt; 6.0L; 2.50"; 2.50" 2006 GMC Sierra 1500 Denali, Sle, Slt; 6.0L; 2.50"; 2.50" 2007 GMC Sierra 1500 Denali, Sle, Slt; 6.0L; Classic Body, New Body; 2.50"; 2.50" 2001 GMC Yukon Denali; 6.0L; 2.50"; 2.50" 2002 GMC Yukon Denali; 6.0L; 2.50"; 2.50" 2003 GMC Yukon Denali; 6.0L; 2.50"; 2.50" 2004 GMC Yukon Denali; 6.0L; 2.50"; 2.50" 2005 GMC Yukon Denali; 6.0L; 2.50"; 2.50" 2006 GMC Yukon Denali; 6.0L; 2.50"; 2.50" 2001 GMC Yukon Xl 1500 Denali; 6.0L; 2.50"; 2.50" 2002 GMC Yukon Xl 1500 Denali; 6.0L; 2.50"; 2.50" 2003 GMC Yukon Xl 1500 Denali; 6.0L; 2.50"; 2.50" 2004 GMC Yukon Xl 1500 Denali; 6.0L; 2.50"; 2.50" 2005 GMC Yukon Xl 1500 Denali; 6.0L; 2.50"; 2.50" 2006 GMC Yukon Xl 1500 Denali; 6.0L; 2.50"; 2.50" ## Details - **Price:** 856.95 CAD - **Vendor:** MagnaFlow - **Type:** Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD) - **Tags:** 2001 GMC Sierra 1500, 2001 GMC Yukon, 2001 GMC Yukon Xl 1500, 2002 Cadillac Escalade, 2002 Cadillac Escalade Ext, 2002 GMC Sierra 1500, 2002 GMC Yukon, 2002 GMC Yukon Xl 1500, 2003 Cadillac Escalade, 2003 Cadillac Escalade Esv, 2003 Cadillac Escalade Ext, 2003 GMC Sierra 1500, 2003 GMC Yukon, 2003 GMC Yukon Xl 1500, 2004 Cadillac Escalade, 2004 Cadillac Escalade Esv, 2004 Cadillac Escalade Ext, 2004 Chevrolet Silverado 1500, 2004 GMC Sierra 1500, 2004 GMC Yukon, 2004 GMC Yukon Xl 1500, 2005 Cadillac Escalade, 2005 Cadillac Escalade Esv, 2005 Cadillac Escalade Ext, 2005 Chevrolet Silverado 1500, 2005 GMC Sierra 1500, 2005 GMC Yukon, 2005 GMC Yukon Xl 1500, 2006 Cadillac Escalade, 2006 Cadillac Escalade Esv, 2006 Cadillac Escalade Ext, 2006 Chevrolet Silverado 1500, 2006 GMC Sierra 1500, 2006 GMC Yukon, 2007 GMC Sierra 1500, 51878, Auto Parts, Automotive, Catalytic Converter, Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD), Direct Replacement, Exhaust Performance, Exhaust System, MagnaFlow, Magnaflow-51878, Muffler, Performance Exhaust, Performance Parts, Vehicle Fitment ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 856.95 CAD | In stock | ## Images - MagnaFlow 51878 Direct Fit OEM Grade Catalytic Converter (2.5" ID/2.5" OD) --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/magnaflow-cadillac-escalade-catalytic-converter-51878) > Updated: 2026-07-16