“NISSAN VR38DETT – KVS38-BT Progressivly wound ‘Pacaloy’ Beehive Valve spring set with titanium retainers. Engineered to match our camshafts for the ultimate in quality, performance and reliability. Intake:36.75mm Installed height 80lb closed pressure. 180lb at 11mm lift. 24mm coil bind height.Exhaust: 33.75mm installed height, 80lb closed pressure.180lb at 11mm lift. 21mm coil bind height.