Large Air Filter A large 7 conical filter with a 3.5 flange opening provides 40 greater airflow over the stock intake system. This washablereusable, 3 - layer, progressively finer porosity, synthetic media provides maximum airflow and performance. Top Mounted Heat Shield Design aFe Power's snap - on heat shield replaces the top of the factory air box to provide a hassle - free installation while maintaining factory mounting locations. Roto - molded Tube This system uses a CAD - modeled, dyno - tuned, roto - molded intake tube to achieve maximum power gains while ensuring a perfect fit.