Eastern Convertors 41178 Catalytic Converter with Integrated Exhaust Manifold - Front

Direct-Fit Manifold Converter for Lexus and Toyota

Eastern Convertors 41178 is a Federal / EPA direct-fit catalytic converter with integrated exhaust manifold for front-position applications. It is built for specific Lexus and Toyota hybrid and gasoline models, with OE-style fitment details that support a straightforward replacement on the vehicles listed below.

The Eastern Convertors Direct Fit Converter w/ Manifold line focuses on direct replacement geometry, integrated manifold construction, and emissions-system compatibility for select front exhaust locations.

Key Features

• Federal / EPA direct-fit manifold converter
• Integrated catalytic converter with exhaust manifold design
• ECO III catalyst type
• One O2 sensor port
• 5-bolt welded inlet with inlet gasket and hardware
• 2-bolt welded outlet with outlet gasket and hardware
• Air tube gasket included
• Front-position application
• Part number: 41178

Detailed Product Overview

Eastern Convertors 41178 is a catalytic converter with integrated exhaust manifold engineered for direct-fit replacement on select Lexus NX300h and ES300h, plus Toyota Avalon, RAV4, and Camry applications. This Federal / EPA unit uses an ECO III catalyst and is configured with a 5-bolt welded inlet, 2-bolt welded outlet, and a single oxygen sensor port for the specified exhaust layout. The direct-fit manifold design supports OE-style alignment for front exhaust service on the listed vehicles.

Compatible With: Fits 2015-2021 Lexus NX300h, front; Fits 2013-2018 Lexus ES300h, front; Fits 2013-2018 Toyota Avalon, front; Fits 2016-2018 Toyota RAV4, front; Fits 2012-2017 Toyota Camry, front. Part number 41178 is the reference to verify before ordering.

Common Replacement Reasons

• Failed catalytic converter efficiency codes
• Exhaust leaks at the manifold or flange connections
• Broken or corroded converter/manifold assembly
• Check engine light related to oxygen sensor or emissions faults
• Restricted exhaust flow from a damaged converter substrate

Installation Notes

Confirm the vehicle’s emissions configuration before installation, since this part is listed for Federal and California emissions applications in the fitment data. Match the inlet and outlet flange styles, gasket locations, and the single O2 sensor port to the original exhaust layout. Verify front-position placement and compare the existing assembly to part number 41178 before beginning service.

Quality Assurance

This converter is built by Eastern Convertors for direct-fit exhaust replacement on the listed Lexus and Toyota applications. The ECO III catalyst type and OE-style manifold configuration are specified for the exact fitment shown in the catalog data.