Replacement Air Filters for our Increasingly popular S54 Velocity Stack Conversion, the most complete conversion avaliable for the BMW S54 Engine, as found in several BMW M Cars including the E46 M3 and the Z4M.

The Tri-Foam System

Why foam? Because, compared to paper or other filter technologies, reticulated polyester foam achieves optimum performance against three key criteria:

Maximum Air Flow

the ability to allow air to pass through without causing a large drop in pressure.

Cleaning Efficiency

the capability to arrest a high proportion of airborne dust while feeding the engine clean air.

Dust Load-up Tolerance

the capability to absorb a large amount of dust without reducing air flow capacity.

Individual socks should be fastened down with a cable tie or jubilee clamp to hold them securely in place.

*Price is per filter