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M54B30 intake cam = 8 degrees advance for 2
This would normally lead to oil and sludge accumulation in the air filter intake pipe
The secondary in-series rear cooler offers an additional 6 rows of cooling capacity
F30 / F31 / F34 330i
Viton Valve Stem Seals, BMW N55 / S55 Nissan M54B30 intake cam = 8Viton Stem Seals for High Performance BMW N55 & S55 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
