5 mm bore size for 3420 cc displacement

Ferrea Valve Spring Kit – BMW M50

Fit either driver or passenger side

The Subaru EJ engine is a series of four-stroke

Viton Valve Stem Seals, BMW N54 E66 5 mm bore size forViton Stem Seals for High Performance BMW N54 Engines Viton Stem Seals are engineered to prevent oil from entering the combustion chamber, ensuring optimal engine performance. Crafted from premium Viton material, these seals offer superior control and durability across the entire RPM range. Their compact design allows for clearance in small inside diameter valve springs. Developed to withstand the extreme conditions of high horsepower and turbocharged