Ferrea 5000 Series Flat Face Valves - D Series Integra DA complemented by a performance pressure

complemented by a performance pressure plate provides an increase of up to 250% in torque capacity

All the remaining parts are 100% stainless steel

double corrugated

The Stainless Maxim Shift knob is machined from a solid stainless round bar in a four-axis lathe

Choice of urethane bushings or upgrade to spherical bushings

Ferrea 5000 Series Flat Face Valves - D Series Integra DA complemented by a performance pressureFerrea 5000 Series Flat Face Valves D Series The 5000 Series Hi Performance Valves have become the alternative for performance engine builders that use our competitors street or performance valve. These valves are machined in our CNC centers allowing tight tolerances and cost effective design. They feature a one piece forging made from stainless steel, a special heat treatment process, hard chrome stems, and hard tip. Our 5000 Series valves are a flat