The ACL Race Series Performance Engine Bearings are engineered for high performance and durability, making them the ideal choice for engine builders and racers around the world. With over 70 years of experience in manufacturing precision engine bearings, ACL has established a global reputation for quality, innovation, and performance.

This ACL Main bearing set-performance .25 Oversize (Product Code: 5M8309H-.25) is specifically designed for crankshafts, featuring overwidth flanges for undersizes to ensure a perfect fit. The Race Series (Tri-Metal) material used in these bearings provides superior strength and reliability, making them suitable for demanding racing environments.

With a maximum wall thickness of 0.0789" (2.005mm) and housing bore sizes ranging from 2.5197" to 2.5205" (64.000mm to 64.020mm), these bearings offer precise oil clearance and maximum support for the crankshaft. The .25mm oversize ensures a perfect match for your engine's specifications, allowing for optimal performance and longevity.

Whether you're building a high-performance race engine or upgrading your daily driver, the ACL Race Series Main bearing set is the perfect choice for any application. With a strong pedigree in motorsport and a commitment to quality, ACL is a trusted name in the automotive industry worldwide. Upgrade to ACL Race Series Performance Engine Bearings and experience the difference in performance and reliability.