MagnaFlow Conv Direct Fit OEM 2005 GMC Sierra/Chevrolet Silverado 1500/Cadillac Escalade Underbody

MagnaFlow part number 4551419 is a multi-fit CARB compliant catalytic converter that covers a wide range of 2003-2005 GM trucks and SUVs. The list includes the Chevrolet Silverado 1500, Tahoe, Suburban 1500, and Avalanche 1500, along with the GMC Sierra 1500, Yukon, and Yukon XL 1500, plus the Cadillac Escalade. If any of these vehicles has a failing converter, this is a direct-fit replacement that bolts into the factory exhaust location.

The mandrel-bent 16-gauge 409 stainless steel tubing replicates the OEM flow path, developed through MagnaFlow's 3D scanning process. The spun body design and single laser fusion weld keep the converter sealed, while 308 stainless steel MIG welds handle every joint. The Torca AccuSeal clamp provides 360-degree distributed clamping force, and MagnaFlow includes a crush ring gasket and donut gasket so you get fresh sealing surfaces without reusing your corroded factory parts. The precision-stamped collector design supports consistent exhaust flow through the converter body.

No cutting or welding is required for installation. This converter meets California Air Resources Board requirements and is legal in all 50 states. For GM truck and SUV owners in CARB-regulated states, that compliance means you can replace a failing converter and pass emissions testing. Confirm your vehicle's Executive Order number and Engine Family Number match this converter's CARB documentation before starting the job.