hengsof 12mm Mini Air Filter, Universal Motor Cold Air Intake Filter Breather, Auto Turbo Vent Intake Filter Cleaner, Crankcase Breather Car Accessories for Motorcycle Engine Parts

CARBON FIBRE MINI CRANKCASE OIL BREATHER FILTER 12mm Features: Material: non-woven Weight: 70g Product size: 12mm / 0.5inch Packing specification: 6.5x6.5x7cm Applicable models: Universal models, the specifications can be installed and used Performance are designed to be used in uprated engine systems to increase the amount thus improving performance.The breather is usually provided with and to oil mist and vapour from fouling the filter. Intake manifold vacuum is applied to the crankcase via the PCV, drawing into the crankcase via the breather. The purpose of a breather filter is to let clean be drawn through the block. Without a speed density (read: ECU) you MUST let the crank draw the MAF or, otherwise you are letting unmetered into your engine which will cause it to run lean. Package Content: 1 x 12mm carbon fibre mini filter.