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Retainer: RET-BMS14-T1
The secondary in-series rear cooler offers an additional 6 rows of cooling capacity
The fan shroud mounts directly to the stock radiator
Pro-Series stud bolts feature a hexagon socket drive for easier installation and a cone-shaped base to protect the threads in the engine block when nuts are tightened
Stock Performance
Viton Valve Stem Seals, BMW N55 / S55 Nissan Retainer: RET-BMS14-T1Viton 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
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