PD HD Valve Spring Kit
Rosten Performance upgraded valve spring kit for 8V PD TDI's.
- This setup contains dual valve springs and custom titanium retainers to allow more valve lift.
- Seat pressure 73lbs compared to the stock 57Lbs, an increase of 28%.
- Open pressure at 10mm lift is 195Lbs compared to the stock pressure of 145Lbs, a 35% increase.
- Make sure you measure your assembled heights ACCURATELY when setting these up as there is no room for error.
- With10mm valve lift there is only 1.2 to 1.5mm before coil bind.
- Minimum install height of outer spring 26.6mm when 10mm or less lift is used.
- 10.5mm valve lift can be used by machining outer spring pocket down 0.5mm and to retain 75lbs/200lbs shim inner spring 1mm.