Kelford Cams Valve Spring Kit (G16E-GTS) - Toyota GR Yaris | GR Corolla
Kelford Valve Springs for the Toyota GR Yaris are uprated beehive springs that stop "valve float" (valves opening too early at high speeds) when boosting over 1.6 bar or pushing past 340 HP.
The kit includes titanium retainers to reduce weight.
Key Specifications
The Kelford Cams Toyota Yaris + Corolla GR G16E-GTS Valve Spring Set is designed for the G16E-GTS engine:
Intake: 100 lb seat pressure at 35.0 mm installed height. 198 lb at 12.0 mm valve lift.
Exhaust: 87 lb seat pressure at 36.7 mm installed height. 178 lb at 11.5 mm valve lift.
Coil bind (solid height): 22.0 mm.
Real-World Benefits
Think of the valve spring like a door hinge. The factory springs are weak; at high boost (high pressure), the engine's air pressure can accidentally blow the "door" (valve) open when it should be closed .
The Kelford beehive springs have a unique shape that is wide at the bottom and narrow at the top . This "beehive" shape is much lighter . It lets your engine rev higher without the valves floating (bouncing or losing control) .
