Building or rebuilding an Oldsmobile Quad 4 engine? Don't skimp on the foundation. This ARP main stud kit is the pro-level upgrade your build needs. It replaces the factory main cap bolts with much stronger studs to securely anchor your crankshaft.
These studs are made in the USA from 8740 chrome moly steel and heat-treated to a massive 200,000 psi tensile strength. Even better, the threads are rolled *after* heat-treating, which makes them way stronger and more fatigue-resistant than typical bolts. This helps eliminate main cap movement (\cap walk\) and protects the threads in your engine block.
The kit comes complete with everything you need: the studs, hardened washers that are parallel-ground for a perfect fit, and high-quality nuts. It's designed for a 2-bolt main configuration. This is the kind of part serious engine builders trust for durability and reliability in high-performance or racing applications. If you're putting time and money into your Quad 4, secure it with ARP.
