Product Summary:

Take your BMW’s performance to the next level with the DNA Stage 2 Adventure Expedition Air Filter. Designed for both road warriors and off-road adventurers, it delivers a powerful blend of increased airflow, exceptional filtration, and extended service life. With a drop-in design and advanced FCd technology, this filter maximizes torque, throttle response, and engine efficiency—making it a must-have upgrade for serious riders.

DNA Stage 2 Air Filter For BMW R Series – Performance Meets Precision

Unleash the true potential of your BMW with the DNA Stage 2 Adventure Expedition Kit (R-BM12E13-S2). This high-performance replacement air filter is engineered to deliver up to 38.50% more airflow compared to stock filters, while maintaining a filtration efficiency of 98–99%. Designed for both road and off-road use, it features DNA’s Advanced FCd (Full Contour Design) and a significantly larger filtering surface for maximum power, torque, and throttle response. Washable, reusable, and easy to install, this is the ultimate upgrade for serious riders.

Peak Engine Performance & Off-Road Durability

Optimized Airflow

• Massive +38.50% Increase in Airflow – From 131.00 CFM (OEM) to 181.40 CFM with the DNA filter.

• Advanced Full Contour Design (FCd) – Smooths and accelerates airflow for improved engine breathing.

• Replaces Restrictive OEM Frame – Unlocks performance by eliminating airbox flow restrictions.

Superior Filtration

• 98–99% Efficiency – ISO 5011 certified, providing excellent engine protection.

• 4-Layer DNA® Cotton Gauze – Ensures clean airflow even in dusty off-road conditions.

Long-Term Benefits

• Reusable & Washable – Eco-friendly and cost-effective over time.

• Extended Service Intervals – 80% larger filtering surface means less frequent cleaning.

• Fuel Recalibration Recommended – For best results after increased airflow.

Installation Instructions

1. Remove the stock OEM air filter and its plastic frame.

2. Insert the DNA Stage 2 filter into the airbox.

3. Follow the BMW workshop manual for proper fitment.

4. Recalibrate the fuel system for optimized performance.

5. Periodically clean and re-oil to maintain peak efficiency.

Vehicle Compatibility

• BMW R1200RT

• BMW R1250 GS

• BMW R1250 R

• BMW R1250 RS

• BMW R1250 RT

• BMW R1250 GSA

• BMW R1200GS (2011–2018)

• BMW R1200 R

• BMW R1200 RS

• FAQs

  Q1. Is this air filter compatible with all BMW R1250 models?
  Yes, it fits the R1250 GS, R, RS, RT, and GSA models.

  Q2. Do I need to modify my airbox to install this filter?
  No, it is a direct drop-in replacement for the OEM air filter.

  Q3. How often should I clean the DNA Stage 2 filter?
  It depends on riding conditions, but due to its larger surface, it requires less frequent maintenance—especially in off-road use.

  Q4. Is recalibration necessary after installation?
  It’s recommended for optimal performance to match the increased airflow with proper fuel mapping.

  Q5. What makes this filter better than stock?
  The DNA filter provides a 38.5% increase in airflow, greater filtering surface, superior filtration efficiency, and is reusable—making it a long-term upgrade.