DNA Stage 2 Performance Air Filter Kit Yamaha YZF-R9 2025

Upgrade your Yamaha R9 with the DNA Stage 2 Performance Air Filter Kit

Designed to replace the stock plastic airbox top cover and OEM air filter for enhanced performance and a more aggressive intake sound. This high-flow kit eliminates the restrictive OEM intake snorkel, significantly improving power and airflow efficiency.

Key Features & Specifications

• High Filtering Efficiency: Achieves 98-99% filtration efficiency with 4 layers of high-quality DNA® cotton, ensuring superior engine protection.
• Massive Flow Increase: Provides a +54.78% airflow boost over the OEM airbox cover and filter:
• DNA Stage 2 Air Filter Flow: 145.80 CFM (Cubic Feet per Minute) @ 1.5’’ H2O @ 25°C
• Yamaha OEM Airbox Cover & Filter Flow: 94.20 CFM @ 1.5’’ H2O @ 25°C
• High-Quality Construction: Made with 4 layers of surgical-grade cotton gauze, reinforced by epoxy-coated marine-grade aluminium wire mesh for maximum durability and airflow efficiency.
• Special Oil Coating: The filter media is pre-oiled with a special formula developed by DNA R&D, creating a static charge to trap even the finest dust particles.
• Lifetime Durability & Warranty: Designed to last the life of your Yamaha R9, backed by a Lifetime Warranty.

Easy Installation & Maintenance

• Direct bolt-on replacement for the stock airbox cover – no modifications required.
• Reusable & washable – clean and re-oil the filter every 3,000 miles using the optional DNA Service Kit.
• Includes stainless steel bracket and zip ties for secure ECU mounting.

Kit Contents

• DNA Stage 2 Performance Air Filter
• Stainless steel ECU mounting bracket
• Zip ties to secure the ECU
• Additional bolt for airboxes with a drain hole (if applicable)
• Installation instructions

Installation Instructions

1. Remove the ECU from the stock airbox lid, along with the OEM air filter and airbox lid.
2. Install the DNA Stage 2 filter by aligning the groove under the filter with the rib of the airbox.
3. Attach the stainless steel ECU mounting bracket using the 10 OEM screws.
4. Reinstall the temperature sensor.
5. Secure the ECU using the provided zip ties.

Performance Benefits

• Increased Performance: Enhanced airflow improves engine power and throttle response.
• Improved Intake Sound: Eliminates the restrictive OEM snorkel, producing a sportier intake note.
• Lightweight & Durable: High-quality materials ensure long-lasting durability and low maintenance.

Optional Accessories

• DNA Air Filter Service Kit – Recommended for easy cleaning and re-oiling, ensuring peak performance and extended lifespan.

Why Choose the DNA Stage 2 Kit for Your Yamaha R9?

• +54.78% airflow increase for improved engine efficiency.
• 98-99% filtration efficiency for superior engine protection.
• Reusable & pre-oiled for instant installation.
• Improved intake sound & performance boost.
• Includes all necessary mounting hardware.

What’s Included?

• DNA Stage 2 Air Filter Kit (Pre-Oiled & Ready to Install)
• Mounting Hardware & Installation Guide