Cold Air Intake System for Toyota 4Runner 3.4L V6 (1999–2002)
Upgrade your Toyota 4Runner’s airflow and performance with this cold air intake system engineered to improve throttle response, horsepower, and overall engine efficiency. Designed to replace the restrictive factory air box, this system allows your 3.4L V6 engine to draw in cooler, denser air—resulting in stronger acceleration, improved drivability, and a more aggressive intake sound.
Whether you’re navigating city streets or pushing harder on open roads, improved airflow helps the engine respond quicker and pull more consistently across the power band. This intake is built with performance, durability, and a clean factory-style appearance in mind, making it a dependable upgrade for daily driving or weekend use.
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Vehicle Fitment
1999–2002 Toyota 4Runner
Engine: 3.4L V6
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Performance & Design
The system features a mandrel-bent aluminum intake tube finished in all black, designed to provide a smooth, uninterrupted airflow path for maximum efficiency. The upgraded Pro Red high-grade air filter offers increased surface area for improved airflow while maintaining excellent filtration to help protect the engine.
Engineers focused on maintaining safe air/fuel ratios throughout the RPM range, ensuring reliable power gains without sacrificing engine health. The design also enhances intake sound, delivering a deeper, throatier tone under acceleration.
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Features & Benefits
Adds noticeable horsepower and torque
Improves throttle response across the power band
Mandrel-bent aluminum intake tube for smooth airflow
High-grade Pro Red reusable air filter for superior filtration
Increased filter surface area for improved airflow
Aggressive, throaty intake sound under acceleration
Easy bolt-on installation by removing the factory air box
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What’s Included
Black aluminum intake piping
Pro Red high-grade air filter
Heat shield
Hoses and basic mounting screws
All required components for installation
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Installation
Direct-fit design
Uses factory mounting locations
Includes basic hardware for installation
Straightforward installation with basic hand tools
Installation Tip:
After installation, it is recommended to briefly reset the car battery's negative ground cable so the engine computer can re-learn the increased airflow. Always disconnect the battery before performing engine work.
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This cold air intake system is a smart upgrade for Toyota 4Runner owners looking to unlock more power, improve throttle response, and enjoy a more aggressive intake sound—all while maintaining reliability and long-term durability. Install it and experience the performance difference every time you drive.