MagnaFlow 5551759 CARB Compliant Manifold Catalytic Converter with Integrated Exhaust Manifold

The MagnaFlow 5551759 is a California Grade CARB Compliant direct-fit manifold catalytic converter with integrated exhaust manifold, engineered as a precise bolt-on replacement. Constructed from highly corrosion-resistant stainless steel with free-flowing mandrel-bent tubing, this spun-body converter installs using standard hand tools — no cutting or welding required.

MagnaFlow's metrology department employs state-of-the-art 3D laser scanning technology during development to ensure this unit fits and functions like the original equipment. The OE-replicating spun-body design features a single laser fusion weld that minimizes leak potential, while the compact, low-mass construction promotes greater thermal efficiency.

Key Features:

• CARB Certified — Meets California Air Resources Board (CARB) emissions requirements; legal for use in California and all other CARB-regulated states
• Stainless steel construction — Both body and tubing are 409 stainless steel for long-term corrosion resistance
• Mandrel-bent tubing — Maintains consistent inner diameter throughout bends for optimized exhaust flow
• OEM-style O2 sensor ports — Two factory-location oxygen sensor ports to prevent check engine light issues
• Flanged inlet and outlet — OE-style flanged connections for a secure, leak-resistant fit
• Ceramic substrate — High-efficiency ceramic catalyst substrate for reliable emissions conversion
• One-piece design — Integrated manifold and converter in a single assembly; 8-inch converter body, 21.75-inch overall length
• All hardware included — Kit contains 2 bolts, 2 flange gaskets, 2 nuts, and 4 flat washers to eliminate reuse of corroded OE hardware

OE Cross-Reference Part Numbers: 18 40 7 514 503, 18 40 7 514 505

Backed by MagnaFlow's lifetime warranty and manufactured by an ISO-9001 certified facility in Oceanside, California, the 5551759 delivers OE-quality fit, emissions compliance, and lasting durability.