SLS Black Series Valve Tappets M159 for M156
The M156 is Susceptible to premature wear of valve train components due to valve tappet bleed downThe M159 features improved Tappet design featuring an anti-friction coating and hydraulic system. These SLS Black Series tappets are design for high RPM and High performance Applications and are a vast improvement over previous tappet designDirect Replacement for M156 and M159 Valve Buckets
M156 ARP Headstuds
Weistec head studs manufactured by ARP, the top name in performance engine hardware. Head studs are used to fasten the heads to the block in place of the factory head bolts. The connection between the cylinder heads and the block is a complex part of the engine. Coolant and oil flow back and forth between the block and the cylinder heads. The head gasket keeps the coolant, oil, and air charge in the cylinders separate from each other with the help of pressure generated by the head bolts. The factory head bolts are "torque to yield" meaning that when installed, they are tightened to the point where they permanently stretch. There have been stock M156 oil leak issues resulting from a poor conn...