Ferrea Viton Valve Stem Seals for the Nissan GTR, 350Z, 370Z, 300ZX, G35, G37, Q40, Q50, and Q60. These Ferrea seals have a high temperature of 475°F, compared to the OEM Nissan 300°F seals. Includes the full set of 24 intake and exhaust seals.- Ferrea...