Toyota GR Yaris Beehive Valve Spring and titanum retainer kit. Remove OEM base and fit supplied base.
- Intake: 125lb seat pressure at 35.0mm installed height. 258lb at 12.0mm valve lift.
- Exhaust: 110lb seat pressure at 36.7mm installed height. 232lb at 11.5mm valve lift.
- Spring coil bind height (solid height) 22.0mm.