Davico 663391 Exhaust Manifold with Integrated Catalytic Converter

The Davico 663391 is a direct-fit exhaust manifold with integrated catalytic converter, engineered as a high-quality OE replacement for vehicles where the catalytic converter and exhaust manifold are combined into a single unit. Manufactured in the USA, this manifold converter is built to meet EPA emissions requirements and restore proper exhaust and emissions performance.

Key Features:

• Direct-fit OE replacement — designed to match original equipment specifications for a straightforward, bolt-on installation
• EPA-compliant catalyst — reduces harmful exhaust emissions to environmentally acceptable levels
• Made in the USA — manufactured by Davico, a dedicated catalytic converter and exhaust specialist with over 35 years of experience
• Quality tested in-house — each unit is inspected to rigorous standards before leaving the facility
• Gaskets typically included — most Davico manifold converters ship with new gaskets; all gaskets should be replaced during installation to ensure proper sealing
• Durable construction — built from high-quality materials including stamped steel or cast iron to withstand demanding exhaust temperatures

Warranty: Davico warrants the catalytic converter to meet EPA emissions requirements for 25,000 miles. The external shell, pipes, flanges, flex couplings, welds, and brackets are covered for 5 years or 50,000 miles, whichever comes first.

Installation Notes: After installation, the system must be checked for unmetered air or exhaust leaks, as even small leaks can negatively affect engine and emissions performance. It is recommended that a professional installer or experienced DIYer perform the replacement. Do not use liquid or RTV sealers near the catalytic converter or on oxygen sensor ports. Resolve any underlying engine issues before installation to protect the new converter.