Intake Manifold Interface for Yamaha YZF600R Thundercat (1995-2007) | OEM 4JH-13586-02 & 4JH-13596-02

Product Overview

Restore the smooth, versatile power of your "Thundercat" with the GOOFIT Precision Intake Manifold Set. Specifically engineered for the 1995-2007 Yamaha YZF600R, this replacement interface (OEM 4JH-13586-02 and 4JH-13596-02) is the essential fix for restoring factory-spec engine vacuum.

Over years of touring and high-speed riding, the original rubber manifolds on the YZF600R are prone to hardening and thermal cracking. This results in air leaks that cause erratic idling, backfiring, and a loss of that signature mid-range punch. Our manifolds are built from high-strength, corrosion-resistant materials to ensure a 100% airtight seal, keeping your engine running cool and responsive.

Product Compatibility

Direct replacement for the Yamaha YZF600R Thundercat inline-four engine. Please verify your OEM codes before ordering.

Brand	Model	Fitment Years	Replaces OEM Part #
Yamaha	YZF600R Thundercat	1995 – 2007	4JH-13586-02 (Left/Inner)
Yamaha	YZF600R	1995 – 2007	4JH-13596-02 (Right/Inner)

Specifications

Feature	Detail
OEM Reference	4JH-13586-02-00 / 4JH-13596-02-00
Material	High-Strength, Fuel-Resistant Synthetic Rubber
Design	Heat-Stabilized for Liquid-Cooled Sport Engines
Properties	Anti-Aging, Crack-Resistant, Deformation-Resistant
Fitment Type	Direct Performance Replacement

Key Features

• Exceptional Heat & Pressure Resistance: Specifically designed to withstand the high-temperature and high-pressure working environment of a high-performance 600cc engine. It effectively resists the deformation that occurs during long-distance touring.
• Precision Vacuum Integrity: Our strict manufacturing process and quality control ensure an exact fit to the cylinder head ports. A perfect seal is vital for maintaining accurate carburetor synchronization and preventing "lean" engine conditions.
• Advanced Material Science: Made of premium corrosion-resistant materials that resist the degrading effects of modern fuel additives. This prevents micro-cracking and dry-rot, significantly prolonging the service life of your intake system.
• Restores Smooth Power Delivery: By eliminating unmetered air leaks, this manifold set fixes common issues such as "hanging idles," difficulty in cold starting, and throttle hesitation during acceleration.
• Direct OEM Fitment: Strictly matched to the 4JH-02 factory specifications for a seamless, bolt-on installation. It ensures the carburetors sit at the correct angle to align perfectly with the airbox.