ACL Race connecting rod bearing set ACL-4B2260H-.25 for Ford Ranger, Transit and Mazda BT50

The ZRP crankshaft for Chevy Small Block is manufactured from aerospace-grade 4340 solid steel, with no compromises made on material quality, to ensure the best possible product. This crankshaft was carefully designed based on our vast experience to provide the best possible engine performance, and the production process involves very strict inspections to ensure they have the highest quality and tight tolerances for a perfect fit. The Chevy crankshaft is fully balanced to 2 gr.cm +/- 0.1 using state-of-the-art Sunnen machines, with a balance results report included. Check the individual features for your application below. Product features and design Solid profile counterweights intended for maximum durability and increased crankshaft momentum. Drilled crank pins to reduce weight and rotating mass. Dual-stage: direct oil feed for better journal lubrication. Straight oil holes for better rod journal lubrication. Chamfered oil holes. Journal radius disperses load stress. Tapered rod journals to reduce weight. Technical features of ZRP crankshafts: Full CNC machining. Ionic (plasma) nitriding process for hardening. Multi-stage heat treatment. Shot peening for stress relief. 100% Magnafluxing for a flawless surface finish. Heat treatment for superior wear resistance. Micro-polished for longer bearing life. Ultrasonic and X-ray tested to ensure a reliable final product.