HKS Valve Stem Seals Nissan Skyline GT-R

With the stock valve stem seal, oil falls when revving continuously to 9,000 or higher. HKS valve stem seal was designed to ensure oil does not fall even up to 10, 000rpm testing with the HKS Drag GT-R.
The valve stem seal is included in HKS Head System Step Pro. Using this item alone with the stock cylinder head is also effective.

HKS put all their know-how knowledge into engine parts from the data they have acquired from the drag race, round race, time attack and drift race. The HKS team provide Engine tuning ranging from Camshafts, Pulleys, Pistons and Rods to Timing Belts, Pump Upgrades and even Head Gaskets. The concept behind HKS engine products was to produce something the customers would truly be happy with.