Performance Foam Replacement Air Filter – BMW 1 & 3 Series (N43/N45 Engines) – 70mm

Upgrade your BMW’s intake system with this high-performance foam replacement air filter, designed for 1.6L petrol models equipped with the BMW N43 and N45 engines. Engineered to replace restrictive factory paper filters, this performance foam filter ensures superior airflow, improved throttle response, and long-lasting filtration efficiency.

Key Features:

• Twin-Layer Foam Construction – Fully reticulated, MAF-safe foam designed to optimize airflow while maintaining excellent dust filtration.

• Direct OEM Replacement – Fits directly into the factory airbox; no modifications required.

• Motorsport-Grade Durability – Built with a stainless steel cage support for strength and stability under demanding conditions.

• Reusable & Easy to Maintain – Clean and reuse with the Ramair CK-003 maintenance kit, reducing replacement costs.

• Custom Polymer Surround – Guarantees a perfect seal and long service life.

Technical Specifications:

• Filter Length: 160mm (6.3")

• Filter Width: 140mm (5.5")

• Filter Shape: Circular

• Filter Neck ID: 70mm

• Material: Dual-Layer Ramair Aeriform Foam

Why Choose This Filter?

Unlike disposable paper filters, this performance foam alternative is washable, reusable, and built with motorsport technology for everyday reliability. It improves engine breathing and throttle response while providing maximum protection for your BMW’s engine.

   Vehicle Compatibility

This filter fits a wide range of BMW 1 Series and 3 Series models powered by the 1.6L N43 and N45 engines.

BMW 1 Series (E81/E82/E84/E87/E88)

• 116i – 2004–2011 (N43/N45)

BMW 3 Series (E90/E91/E92/E93)

• 316i – 2006–2013 (N43/N45)