Dorman 674-099 Catalytic Converter with Integrated Exhaust Manifold

OE-Style Manifold Catalytic Converter

Dorman 674-099 is a catalytic converter with integrated exhaust manifold built for specific Lexus and Toyota applications. It follows the original equipment layout with a flanged inlet and outlet, stainless steel converter body, and ceramic substrate for a direct replacement on listed vehicles.

Compatible With Lexus NX450h+, RX450h+, NX250, NX350h, ES250 and Toyota Venza, Camry, Highlander, RAV4, Sienna, and Avalon applications across the listed model years. This part number, 674-099, is built to match OE fitment details for the exhaust manifold and converter assembly.

• Integrated exhaust manifold and catalytic converter design
• Flanged inlet and outlet connections
• Stainless steel converter body with ceramic substrate
• Natural finish and regular grade construction
• Includes inlet gasket, outlet gasket, outlet hardware, and heat shield hardware
• One sensor port
• Cross-reference: 17141F0010

Detailed Fitment and Construction

This manifold converter is precision-engineered to mirror the OE configuration on select Lexus and Toyota vehicles, including 2022-2025 Lexus NX450h+, 2024-2025 Lexus RX450h+, 2022-2024 Lexus NX250, 2022-2023 Lexus NX350h, 2021-2023 Toyota Venza, 2021-2022 Lexus ES250, 2022 Toyota Camry, 2022 Toyota Highlander, 2022 Toyota RAV4, 2021-2022 Toyota Sienna, 2021 Toyota Avalon, 2021 Toyota Camry, 2020-2021 Toyota Highlander, 2021 Toyota RAV4, 2018-2020 Toyota Camry, and 2019-2020 Toyota RAV4. The flanged inlet and outlet, round port shapes, and OE-style mounting points support a proper exhaust seal and factory-style installation on the listed applications.

What It Helps Address

• Failed catalytic converter efficiency on the listed vehicles
• Exhaust leaks at the manifold-to-pipe connection
• Cracked or deteriorated manifold converter assemblies
• Check engine light concerns related to converter performance or sensor feedback
• Corrosion or heat damage in the original exhaust manifold assembly

Installation Notes

Verify the vehicle year, make, model, and emissions configuration before ordering. This unit uses flanged inlet and outlet connections, includes an inlet gasket and outlet gasket, and has one sensor port. Confirm the mounting hole count and port layout against the original part before installation. Professional installation is recommended to ensure proper sealing, sensor transfer, and exhaust alignment.

Quality Assurance

Dorman designs this manifold catalytic converter as an OE-style replacement for specific applications, with materials and dimensions selected to match the original exhaust manifold converter assembly. It is not CARB compliant and is not New York certified, so it should be used only where the listed emissions configuration is permitted.