The ACL Race Series Main Bearing Set in STD size is a high-performance crankshaft component designed for precision engine builds. With a product code of 5M1038H-STB, this set is a top choice for engine builders looking for quality and reliability.

Made from ACL's Race Series Tri-Metal material, this Main Bearing Set is designed for positions 1, 2, 3, and 4 in your engine. The standard shaft diameters range from 2.6484" to 2.6493" (67.269mm to 67.292mm), ensuring a perfect fit for your crankshaft. The oil clearance and maximum wall thickness are to be announced, providing peace of mind for optimum performance.

The housing bore diameter is between 2.8406" and 2.8415" (72.151mm to 72.174mm), with a maximum length of 0.8050" (20.440mm). The Main Bearing Set also features a standard shaft diameter range of 2.6479" to 2.6488" (67.257mm to 67.280mm) and the same oil clearance and maximum wall thickness specifications as the previous positions.

The ACL Race Series has a rich history in precision engine bearings, manufacturing products for over 70 years in Launceston, Tasmania, Australia. As a major OEM supplier to the automotive industry, ACL has earned a global reputation for quality, innovation, and performance.

With a strong motorsport pedigree dating back to the 1960s, the ACL RACE Series Performance Engine Bearings have been used in Formula 1, Australian Supercars, drag racing, speedway, drifting, and rally competitions. The extensive range of over 200 engine applications covers a wide variety of performance engines from around the world.

ACL's vertical integration ensures quality control from design to manufacturing, with certifications in ISO9001:2015 Quality Management, ISO14001:2015 Environmental Management, and ISO451001:2018 Occupational Health & Safety Management. Choose ACL Race Series Main Bearing Set for your next engine build and experience the difference in performance and durability.