Exhaust Valve Seat (20+ Lbs of Boost) 33mm Pro Valve Seats are made of Nickel Aluminum Bronze material for extra-long life in performance engines. With track proven results the machine-ability, longevity, and thermal conductivity far surpass the stock...

Intake Valve Seat (20+ Lbs of Boost) 40mm Pro Valve Seats are made of Nickel Aluminum Bronze material for extra long life in performance engines. With track proven results the machine-ability, longevity, and thermal conductivity far surpass the stock...