Designed as a direct replacement for factory M156 head bolts, our ARP Head Studs are one of the most popular upgrades for the M156 Engine. These 11mm ARP studs are made of 625 grade Inconel and are equipped to handle extreme cylinder pressures.
Early M156 engines are prone to head bolt damage in factory state and this upgrade is also a great option for simple replacement. Paired with many of our other popular M156 engine upgrades, we make it an easy choice for you.
Kit Includes:
- Twenty ARP 625 Grade Inconel Head Studs
- Twenty ARP Head Stud Washers
- Twenty ARP Head Stud 12-Pt Nuts
Installation requires silicone sealant.
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Note: This item is ordered on demand from PTG USA. Expected lead time is 2–3 weeks. We’ll notify you if any delays apply. All import duties and taxes are included in EuroFlow’s price.
