10 Best Automotive Replacement Engine Main Bolts & Studs 2025

When it comes to keeping your engine running smoothly, the quality of your main bolts and studs can make all the difference. We reviewed and scored many products in the Automotive Replacement Engine Main Bolts & Studs category, and found products ranging from a 7.7 score up to a phenomenal 9.8 score. The top rated item on our list is the ARP 2342503 Stud Kit from the trusted brand ARP. This high-performance stud kit is made from premium materials and engineered to withstand extreme conditions, ensuring that your engine stays securely in place. Don't settle for subpar bolts and studs that could compromise your engine's performance - trust ARP and our other top-rated products to keep your engine running at its best. Check out our full list for more expert recommendations and make the best choice for your vehicle.