Cold Air Intake for Honda Civic SI (1999-2000) 1.6L L4 Engine

Vehicle Fitment

• 1999–2000 Honda Civic Si
• 1.6L Inline-4 Engine
• Manual transmission equipped models
• Designed for factory manifold and engine management systems

Performance & Engineering

High-Flow Air Intake Design: This intake system replaces the factory air box and intake tube with smooth, mandrel-bent aluminum piping to reduce airflow restriction and turbulence. Improved airflow allows the engine to breathe more efficiently across the RPM range.

Power Gains: Under optimal conditions, this cold air intake can deliver gains of up to 10% in horsepower and torque. Actual results may vary depending on vehicle condition, altitude, ambient temperature, and supporting modifications.

Throttle Response: Reduced intake restriction results in faster throttle response and improved acceleration during both city and highway driving.

Construction & Materials

T304 Aluminum Intake Tubing: The intake pipe is constructed from lightweight T304 aluminum for excellent corrosion resistance, durability, and improved heat dissipation. Mandrel bending ensures a consistent internal diameter to maintain airflow velocity.

High-Flow Performance Filter: The included open-element air filter is designed for high airflow while maintaining effective filtration. Its washable and reusable design reduces long-term maintenance costs compared to disposable paper filters.

Features & Benefits

• Boosts horsepower and torque by up to 10%
• Improves throttle response and acceleration
• Mandrel-bent T304 lightweight aluminum piping
• Engineered for high airflow and effective filtration
• Replaces factory air filter and intake tube
• Maximizes airflow through the stock intake manifold
• Produces a deeper, sportier intake sound
• Washable and reusable high-flow air filter
• Does not void factory vehicle warranty when properly installed

What’s Included

• T304 aluminum intake pipe
• High-flow washable performance air filter
• Silicone couplers
• Clamps and mounting hardware

Installation

• Direct bolt-on installation
• No cutting or drilling required
• Uses factory mounting locations
• Estimated installation time: under 60 minutes
• Basic hand tools recommended

Installation Note: After installation, disconnect the negative battery terminal for at least 60 seconds to allow the ECU to reset and adapt to the increased airflow. Always disconnect the battery and ensure the engine is completely cool before performing installation.

Filter Maintenance

Inspection Schedule: Inspect the air filter every 5,000 miles and clean if necessary. Driving conditions such as dusty environments, urban traffic, or aggressive driving may require more frequent inspection and servicing.

Cleaning Procedure: Remove the filter from the intake tube and gently tap it to dislodge loose debris. Apply a suitable air filter cleaning solution to both the inside and outside of the filter media and allow it to soak for approximately 10 minutes.

Rinse the filter using low-pressure water from the clean side outward until the water runs clear. Shake off excess water and allow the filter to air dry completely in a clean environment. Once dry, apply air filter oil evenly according to product specifications and allow the oil to wick through the media for approximately 20 minutes before reinstalling. Do not oil a wet filter.

Sound Characteristics

Intake Sound: The open-element filter and high-flow intake design create a deeper and more aggressive intake tone during acceleration, while remaining controlled and refined during normal driving.