The ACL Race Series Main Bearing Set in STD size is a high-performance upgrade for your crankshaft. With a product code of 4M2273HX-STB, this set is designed for maximum durability and precision, featuring a Race Series (Tri-Metal) material construction for superior strength.

With an extra 0.001" of oil clearance, this main bearing set is perfect for high-performance engines that require additional lubrication. The set includes bearings for positions 1, 2, and 4, with standard shaft diameters of 2.6768"/2.6775" (67.992mm/68.008mm). The maximum wall thickness is 0.0948" (2.409mm), and the housing bore measures 2.8687"/2.8694" (72.866mm/72.882mm).

For position 3, the upper and lower bearings have the same shaft diameter and maximum wall thickness as positions 1, 2, and 4. The upper bearing has a maximum length of 0.9560" (24.290mm), while the lower bearing has a maximum length of 0.7780" (19.750mm).

The ACL Race Series Main Bearing Set is part of a long and esteemed history of precision engine bearings manufactured in Launceston, Tasmania, Australia. ACL has been supplying OEM parts to the automotive industry for over 70 years and has a global reputation for quality, precision, and performance.

With a strong presence in motorsport, including Formula 1, Australian Supercars Championship, drag racing, speedway, drifting, and rally, ACL's RACE Series Performance Engine Bearings are the top choice for engine builders around the world. The company's range of over 200 engine applications covers a wide variety of performance needs for Australian, American, Japanese, Korean, and European vehicles.

The ACL Race Series Main Bearing Set is backed by ACL's commitment to quality and innovation, with ISO9001:2015, ISO14001:2015, and ISO45001:2018 certifications for their Business Management Systems. Upgrade your crankshaft with the best in precision and performance with the ACL Race Series Main Bearing Set.