Audi RS3/TTRS/RSQ3 Ferrea Kelford valvetrain kit-2.5TFSI DAZA/DNWA/CEPA/CZGB

Kelford Beehive valvespring set : Premium quality spring steel wound in USA by PAC. Made with advanced heat treatment processing and surface finishing techniques (nano peening) to extend fatigue life.Audi RS3 valve springs have a high spring frequency for superior spring surge control under high RPMs and boast a 30% higher seat pressure than the OEM spring. The RS3 beehive valve spring kit is specifically designed for high boost and high RPM applications. 104lbs seated pressure at 36.0mm installed height. 214lbs at 11.5mm valve lift. Coil bind at 23.6mm. FERREA COMPETITION PLUS VALVES (INTAKE) Ferrea's Competition Plus Intake Valve are reliable and extreme duty valve option for the 2.5L 20V engines for both N/A or boosted applications. 2-step slow forged from special aerospace quality EV8-Z18 alloys eliminates material structural damage and provides proper grain flow with extremely reliable high-tensile strength. Each valve is heat-treated and stress-relieved over a 48-hour period fo