Eastern Convertors 40598 Catalytic Converter with Integrated Exhaust Manifold - Front Left or Left

Direct-Fit Catalytic Converter for Toyota Trucks and SUVs

Eastern Convertors DIRECT FIT Part Number 40598 is a Federal / EPA direct-fit catalytic converter with integrated exhaust manifold built to OE dimensions for accurate replacement fitment. It uses ECO III catalyst technology and a high-efficiency NANO substrate chemistry to support proper exhaust flow and emissions control on the listed Toyota applications.

The DIRECT FIT product line is built for exact dimensional replacement, using automated manufacturing, spinner welding, and high-speed production processes to maintain consistent fit and repeatable output. For buyers searching for a 2003-2009 Toyota 4Runner left catalytic converter or a 2005-2008 Toyota Tacoma left exhaust manifold converter, this part number 40598 is built for those specific applications.

Key Features

• Part Number: 40598
• Brand: Eastern Convertors
• Brand line: DIRECT FIT
• Part type: catalytic converter with integrated exhaust manifold
• Federal / EPA direct-fit manifold design
• ECO III catalyst type
• NANO substrate chemistry for efficient catalyst loading
• 6-bolt welded inlet connection
• 2-bolt welded outlet connection
• 1 O2 sensor port
• Overall length: 24 inches

Detailed Description

Eastern Convertors 40598 is a direct-fit exhaust manifold catalytic converter engineered for the left side of select Toyota platforms. It is listed for 2003-2009 Toyota 4Runner, 2007-2009 Toyota FJ Cruiser, 2005-2008 Toyota Tacoma, and 2005-2006 Toyota Tundra front left radiator side applications. The OE-style dimensions and welded flange configuration support a straightforward replacement where the original manifold converter has failed, triggered a check engine light, or no longer meets emissions requirements.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Part Helps Address

• Check engine light related to catalyst efficiency or exhaust flow faults
• Cracked or leaking exhaust manifold converter housing
• Failed emissions inspection caused by a worn catalytic converter
• Exhaust noise from a damaged manifold-to-pipe connection
• Restricted exhaust flow from a deteriorated converter substrate

Installation Notes and Tips

Verify the vehicle’s emissions certification before ordering. This part is not for sale or use in California, Colorado, Maine, or New York on vehicles with California emissions. Confirm left-side or front-left placement, the 6-bolt welded inlet, the 2-bolt welded outlet, and the single O2 sensor port before installation. Because this is an integrated manifold converter, inspect adjacent exhaust components, gaskets, and sensor condition during replacement.

Quality Assurance

Eastern Convertors uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The ECO III catalyst and NANO substrate chemistry are used to support efficient catalyst loading and consistent converter performance across the listed Toyota 4Runner, FJ Cruiser, Tacoma, and Tundra applications.