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The standard airbox is cuboid in shape which gives rise to turbulence and increases the drag on the turbo as a result
Additional 80-90 hp on a stock vehicle
This leads to an optimised intake system which delivers noticeable performance gains consistently
This cast flow formed wheel is made with the highest level of design and engineering available in the world today
It seals against the engine bay heat whilst still allowing some air entry from the cold side of the engine bay where the hood meets the wing
CSF B58 | B48 Charge Cooler Water Radiator - BMW M140i | M240i | 340i | 440i M5 (E39) The standard airbox is cuboidThe CSF Charge Cooler Water Radiator AKA Heat Exchanger is the most technologically advanced on the market. The tuning potential for the charge cooled M1 240i, 1 2 3 420i and 1 2 3 425i is huge. However, once boost levels are increased the charge air temperature increases which is due to compressed air heating up. The stock cooling system works okay on a stock car but once boost levels are increased and more heat is introduced it begins to struggle.