... We supply such styles of BOV as Blitz style, Greddy style, HKS style, Turbo-xs style, and Tial style. ... life of springs and diaphragms used for the BOV lasts for 200,000 times of operation (open ... (or 392°F) ;3) Materials used for making BOV are high quality aluminum alloy;4) Accessories: flanges, ... bolts and gaskets are included.We have following bov for your selection.Please feel free to contact us ...