HKS External Poppet Type Wastegates are available in Standard and Race configurations. Both feature stainless valves, die cast mounting bases, actual valve seats, fully sealed shafts, high temperature diaphragms, and large outlet pockets. Standard gates utilize a 40mm valve and are recommended for use on engines producing upwards of 50 hp. Race gates are 50mm and will support up to 1,000 horsepower. Also available are several different wastegate springs, base flanges, gaskets, and flex outlet tubes for various custom wastegate installations.