ACL Bearings 5M1432HX-STD Race Series Main Bearing Set Ford 351W 400 Standard

The ACL Bearings 5M1432HX-STD is a Race Series main bearing set designed for Ford 351 Windsor (351W), 351 Modified, and 400 cubic inch V8 engines in standard size. The HX designation indicates this bearing set provides 0.001 inch extra clearance on standard journal sizes, making it ideal for performance and racing applications where precise oil clearance control is critical.

Race Series Performance Engineering:

• ACL Race Series performance bearings are engineered for extreme endurance under harsh conditions
• Top-of-the-line metallurgy eliminates concerns about fatigue, stress wear, and failure when running high RPMs and big boost
• Special coating process helps prevent premature engine bearing failures and expensive engine damage
• Unique combination of design, metallurgy and engineering provides endurance and capability to perform where others cannot

Application & Clearances:

• Fits Ford 351 Windsor, 351 Modified, and 400 V8 engines
• Bearings are 0.0005 inch thinner per half to give 0.001 inch extra clearance for standard sized crankshafts
• ACL Race Series bearings can be assembled with 0.00075 to 0.001 inch per 1 inch of journal diameter plus 0.0005 inch as a good starting point, with actual oil clearance determined by the engine builder depending on application
• It is common practice to adjust oil clearances by mixing bearings of adjacent grades, with the maximum difference between shells being no more than 0.0005 inch

ACL is an engine builder's top choice for quality and consistency, serving as an Original Equipment supplier found in many vehicles on the road. Race Series rod and main bearings are standard components in race engines that have set records and won championships from Mexico to Bonneville, including sport compact drift racing to small block NASCAR, IHRA and NHRA competitions.