TB Developments 4efte Uprated Valve Springs Celica-GT4 Greater density of rows for

Greater density of rows for higher cooling capacity

Fault Diagnostics

you'll find the name stamped right on the end

6 Axis Acceleromater and Gyro

Gear compensations for spark

TB Developments 4efte Uprated Valve Springs Celica-GT4 Greater density of rows forProduct Description We custom designed these valve springs for the 4e 5e engine platform to combat valve float often encountered in engines running a higher than standard RPM or higher boost levels which force the valves open when in a closed position resulting in a loss in power, valve flutter, miss fire and massively increasing the risk of detonation knocking pinking. The valve spring in OEM form is very soft for its applications, even in comparison