Molas duplas de válvulas e chapéus

Especificações:
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.
With 11mm valve lift there is ~2mm to coil bind.