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One being catted (with high-flow catalytic converter) and the other being catless(all the catalytic converters are removed)
• SIDE SKIRTS DIFFUSERS
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Wide application: Fits most popular racing and high-performance calipers
It offers high quality
BMW S55 CARBON INTAKE SYSTEM F8x M3|M4 BY INFINITY DESIGN airintake One being catted (with high-flowDesign we have opted for both banks having large cross sectional turbo inlet tubes with integrated MAFs with smooth non concentric expanding inlet tubes which with silicone couplers. The expanding large volume inlet tube acts like a large velocity stack which accelerates the airflow and is much larger than the small and short velocity stack fitted to the internals of the oem intake. The result of the smoother airflow from our inlet tube is a far