SUBARU IMPREZA EJ20 - EJ25

SUPERTECH valve spring kit for SUBARU IMPREZA WRX - STI engine EJ20 y EJ25.

Composed by:

- double valve springs.
- titanium valve cups.
- spring seat base.

All Supertech valve springs are made of silicon Cr-vanadium alloy steel, to provide increased durability and performance at high turns.
The use of quality steel with the correct alloy develops a better structural memory to return to its position.
All springs are manufactured by a computer program to guarantee the indicated pressure.

**Recommended only for high performance engines that turn high on turns.
   (Not use on standard OEM camshafts). 

The data that we indicate is the pressure to the seat (kgs), this means the force that the spring uses to keep the valve closed.