This Turbosmart RacePort inner spring sets an 8 inHg seat rate for Turbosmart RacePort blow-off valves, providing a specific spring rate choice for tuning release characteristics. Turbosmart designs and manufactures its products in Sydney, Australia with tight quality control, and these springs are built to match the RacePort BOV range.
Turbosmart BOV RacePort 8 inHg (Orange) Spring - Inner