TTR-SU-WRXSTI

Subaru WRX/STI Spring Retainer

Subaru - Impreza WRX 02'-05'
Subaru - Impreza WRX STI 04'-07'
Subaru - Impreza WRX 06'-07'

*Sold in sets of 16*

Our Spring Retainers are made from only the highest quality titanium and all are precision CNC machined. These retainers are designed to work with stock valvesprings, increasing the rpms the motor can spin before valve float occurs! The lighter reciprocating mass also frees up horsepower which was normally spent moving the heavy stock steel components. A common rule of thumb is for every gram of valvetrain weight lost, an engines effective redline increases by 40 rpm before valve float occurs!