Our Pro-Series Duratec Dual Valvespring Kit is for engines that rev-over 8,000rpm with aggressive cams or high boost!Includes:16pcs Dual REM polished ..
For High Compression engines!****Our flat face valves reduce the chamber volume about 1cc!****35mm (Stock), or 36mm (+1mm) Head Diameter5.5mm. (Stock)..
For High-RPM or Low-Compression engines****Our dished face valves are similar volume to OEM valves****35mm(Stock), 36mm(1mm), or 37.5mm( 2.5mm) Head D..
For High-RPM or Low-Compression engines****Our dished face valves are similar volume to OEM valves****30mm (Stock), 31mm (+1mm), or 32mm (+2mm) Head D..
5.5mm Duratec Valve Keepers that work with OEM retainers and both of our upgraded valvespring kits!1 pair of keepers16 pair of keepers are needed for..
These 31mm solid cam followers will work with our Ecboost and Duratec camshaft sets, and are available in the following range of thickness': 3.000 - 3..