Dorman 674-863 Catalytic Converter with Integrated Exhaust Manifold - Front

Dorman 674-863 Catalytic Converter Manifold

Dorman 674-863 is a catalytic converter with integrated exhaust manifold for specific Toyota and Lexus front applications. It is precision-engineered to match original equipment dimensions and mounting points for a direct replacement on the listed vehicles.

Key Features

• Catalytic converter with integrated exhaust manifold for a manifold converter design
• Stainless steel converter body for durability in exhaust service
• Natural finish with a round inlet port shape
• Inlet gasket included for installation support
• Outlet mounting hardware included
• Regular grade replacement part
• CARB certified: No

Vehicle Fitment

• Fits 2004-2010 Toyota Highlander, front
• Fits 2006-2008 Lexus RX400h, front
• Fits 2004-2006 Lexus RX330, front
• Fits 2004-2006 Toyota Sienna, front

Detailed Description

This Dorman catalytic converter manifold is built for front exhaust locations on the listed Toyota Highlander, Lexus RX400h, Lexus RX330, and Toyota Sienna applications. Part number 674-863 follows the original equipment layout with an integrated exhaust manifold, stainless steel converter body, and OE-style mounting features to support a proper exhaust connection and emissions system repair. This part cross-references Bosch 16392 for the same application.

What It Helps Address

• Failed catalytic converter efficiency codes
• Exhaust leaks at the manifold-to-head connection
• Cracked or damaged integrated manifold assemblies
• Restricted exhaust flow from a worn converter
• Check engine light concerns related to front exhaust emissions components

Installation Notes and Tips

Verify engine and emissions configuration before ordering, since this part is not CARB certified. Confirm the front position, inlet port shape, and mounting points against the original assembly. Use the included gasket and outlet mounting hardware during installation, and inspect adjoining exhaust components for corrosion or damage before reassembly.

Quality Assurance

Dorman engineers this manifold converter to match OE fit and function on the specified vehicles. Part number 674-863 is built as a direct replacement for front exhaust service on the listed Toyota and Lexus applications.