Big Valve Anima Heads SOLD OUTTHE BEST BIG VALVE ANIMAL HEAD YOU CAN BUY (here's why This head features a stainless steel 1 l 4" intake and 1 1 8" exhaust valve. Completely CNC Ported with 4axis Mill Hand Blended Ports Epoxy Filled To Optimize Velocity The Only Head with CNC Combustion Chamber for Max Efficiency Non Beryllium Copper Seats (same material that NASCAR engines use) (not toxic) Seats have +3x the Heat Conductivity of Steel Seats to Help Pull Heat Out of Valves The