Supertech Intake Valve Kits for Nissan SR20. Supertech Intake valves are made exclusively from an enhanced version of EV8 (21-4N) steel. This is the highest grade of steel available and provides the strength to withstand just about any application.
Supertech Intake Valve Kits for Nissan SR20. Supertech Intake valves are made exclusively from an enhanced version of EV8 (21-4N) steel. This is the highest grade of steel available and provides the strength to withstand just about any application.