DNA Air Filter for RE Bullet/Classic/Thunderbird-350/500 (18-20)

DNA Air Filter for RE Bullet/Classic/Thunderbird 350/500 (18-20)

Upgrade your Royal Enfield with the DNA Air Filter for RE Bullet/Classic/Thunderbird 350/500 (18-20). This washable and reusable filter uses a round design and fits into the existing factory air box. Moreover, it delivers 42.84% more airflow than the Royal Enfield stock paper filter while maintaining 98-99% filtering efficiency. Visit our website for more products Dirt Street.

High-Flow Air Filter Design

The DNA air filter provides a simple drop-in replacement for the stock filter. Its round design supports airflow while maintaining high filtration efficiency. Furthermore, the filter uses four layers of DNA Cotton to help protect the engine from dirt and fine particles.

The filter delivers 122.20 CFM of airflow compared with 85.55 CFM from the Royal Enfield stock paper filter. As a result, the DNA filter provides a measured 42.84% increase in airflow.

Filtration Efficiency

The filter achieves 98-99% filtering efficiency according to ISO 5011. This means the filter can retain 98-99 grams of dirt for every 100 grams it receives. It also applies to fine dirt particles as small as 5 microns.

Therefore, the filter combines increased airflow with high filtration efficiency for everyday motorcycle use.

Easy Installation

Installing the DNA Air Filter for RE Bullet/Classic/Thunderbird 350/500 (18-20) is straightforward. Simply follow the installation information provided in the Royal Enfield workshop manual.

Because the filter fits the existing factory air box, installation does not require replacing the complete air-box assembly. This makes it a practical replacement for the stock air filter.

Road, Off Road & Race Use

DNA designed this filter for Road, Off Road & Race use. Therefore, riders can use the same high-flow filter across different riding environments while retaining the factory air-box setup.

The washable and reusable design also provides a practical alternative to replacing a standard disposable filter.

Airflow Performance

The airflow figures clearly show the difference between the DNA filter and the Royal Enfield stock paper filter:

• DNA Air Filter Air Flow: 122.20 CFM
• Royal Enfield Stock Paper Filter Air Flow: 85.55 CFM
• Increase in Air Flow: 42.84%
• Filtering Efficiency: 98-99%
• Filter Design: Round Design
• Filter Use: Road, Off Road & Race
• OEM Cross Reference: 581007-A
• Filter Type: High Flow Air Filter
• Filter Material: 4 layers of DNA Cotton
• Construction: Washable and reusable

Why Choose This DNA Air Filter?

The DNA Air Filter for RE Bullet/Classic/Thunderbird 350/500 (18-20) combines high airflow with strong filtration. In addition, its washable and reusable construction makes it suitable as a replacement for the stock paper filter.

With 122.20 CFM airflow and a 42.84% increase over the stock filter, it offers a clear airflow improvement based on the supplied test figures. At the same time, its 98-99% filtering efficiency helps maintain effective engine protection.

Compatibility

This DNA high-flow air filter is designed for the following Royal Enfield applications:

• Royal Enfield Bullet 350
• Royal Enfield Classic 350
• Royal Enfield Thunderbird 350
• Royal Enfield Bullet 500
• Royal Enfield Classic 500
• Royal Enfield Thunderbird 500
• Model years: 2018-2020

OEM Cross Reference: 581007-A

Installation & Maintenance

For installation, follow the instructions provided in the Royal Enfield workshop manual. The filter uses a drop-in design that fits the existing factory air box.

Because the filter is washable and reusable, you can clean and reuse it instead of replacing it as frequently as a conventional disposable filter.

Weight	0.5 kg
Dimensions	10 × 10 × 5 cm
Country of Origin	Greece