Porsche 957 S / GTS BMC F1 Replacement Air Filters (2008-2010) Exterior HJS German catalytic converters aka

HJS German catalytic converters aka catalysts on a properly tuned and functioning engine and engine management systems offer guarantee NO CEL - NO Check Engine Lights

fits OEM 957 S/ GTS airbox for improved airflow and performance

993 Carrera DME/ECU Upgrade

A great option for track-oriented Carreras

Removing the factory cats will make your F430 much louder and more aggressive sounding with no increase in cabin drone

Porsche 957 S / GTS BMC F1 Replacement Air Filters (2008-2010) Exterior HJS German catalytic converters akaHigh performance drop in replacement for the factory air filters; fits OEM 957 S GTS airbox for improved airflow and performance. Starting with its outer frame, BMC uses a special soft rubber material made in a process called "full molding", which not only provides a much tighter seal around the filter, but also eliminates any potential cracking or breaking of the filter. The filter element itself is made of a washable cotton material that provides