Yaris G16E-GTS Extreme beehive valve spring and titanium retainer kit. Remove OEM base and fit supplied base.
Designed for professionally built race engines running big boost and high RPM. Will support 65psi and 11,000RPM.
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.
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