Injen AMSOIL Replacement Nanofiber Dry Air FIlter-Small 3in Neck/5in Base/4-7/8in Height/85 Pleat

In 1999 Injen designed the first urethane filter with a built in velocity stack for added performance. The Injen Technology Research and Development Team calculates each filters mesh and pleat count for each specific application during the development stages.