This filter has a rubber polymer base and a cone shaped filter element, These filters are cone shaped because it enables easy fitting to space restricted engine compartments and with the extremely large amount of foam surface area an added boost of power to your engine too! With its extra large size, technologically advanced filter is capable of handling great flow rates. The filter is specially strengthened using a stainless steel internal mesh, which we have developed & used in european and world touring cars! With its extra large size, technologically advanced filter is capable of handling great flow rates. Internal Neck Diameter (mm) Filter Height (mm) Neck Length (mm) Filter Base Width (mm) Material Unit Quanity 70, 76, 80, 85 & 90 146 37 200 Twin Layer Foam Body / Polymer Neck 1