Ferrea Racing Engine Valves is a US manufacturer of high-performance valve and valvetrain components. Drawing on racing-team development, they produce stainless-steel and titanium valves, springs, retainers and upgrade kits in their 5000 (street) and 6000 (competition) series. Ferrea’s rapid production turnaround, advanced material treatments and strict quality controls ensure parts that raise horsepower potential and endure the rigours of both street and circuit use.