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This is a complete package for strengthening the weak points of the M156 top end. Both known issues, the weak head bolts and the excessive wear off the valve buckets, are addressed by replacing the head bolts with Weistec ARP M156 Head Studs, installing the camshafts with all ARP hardware, and switching the valve buckets to new OEM SLS Valve Buckets.
M156 ARP Head Studs
M156 ARP Cam Cap Bolts
M156 ARP Cam Phaser Bolts
SLS Valve Buckets
Solution for weak factory head bolts
Prevent Head Gasket Leaks and Engine Damage
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Unless otherwise stated, some Weistec Engineering performance upgrades are sold for race car use only.