{"product_id":"acl-trimetal-reinforced-rod-bearings-honda-b18a-b20a-sohc","title":"ACL Race Series connecting rod bearings for Honda B18A, B20A SOHC","description":"\u003cp\u003eACL Race Series connecting rod bearings for Honda B18A, B20A SOHC (part number 4B1946H), designed for engines that will operate under much higher loads and higher RPMs than stock.\u003c\/p\u003e\u003cp\u003eThese are tri-metal bearings: SAE 1010 steel backing, a copper-lead-tin layer approximately 0.3 mm thick, a nickel barrier, and a surface overlay of lead, tin, and copper that conforms to the crankshaft surface and resists seizing. In connecting rod bearings, the overlay is thinner to better withstand fatigue.\u003c\/p\u003e\u003cp\u003eRace Series bearings feature increased crush and a slightly more eccentric shape than standard bearings, two details designed to ensure the bearing does not move and maintains proper lubrication when the block and connecting rods deform under load.\u003c\/p\u003e\u003cp\u003eIn standard size, ACL specifies them for a connecting rod journal of 44.980 to 45.000 mm, with a bearing width of 19.5 mm. For that diameter, they recommend an oil clearance of approximately 0.049 to 0.058 mm, measured with a micrometer and bore gauge. If the crankshaft has been reground, the measurement changes.\u003c\/p\u003e\u003cp\u003eThey do not have the silver-tin final plating of standard bearings, so their dark, brownish-black and bluish color is factory-standard and does not indicate any defect. ACL advises against polishing the bearing surface to adjust clearance; if more is needed, they should be combined with the HX version, which provides an additional 0.025 mm of clearance.\u003c\/p\u003e\u003cp\u003eIf the crankshaft has been reground or you are unsure of the required size, please contact us with your engine code before ordering.\u003c\/p\u003e","brand":"ACL","offers":[{"title":"Default Title","offer_id":50813079978318,"sku":"ACL-4B1946H\/32","price":52.13,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/2d52d6f28854525fe6ff10a97d0f3726.jpg?v=1735903671","url":"https:\/\/driftandgrip.com\/en\/products\/acl-trimetal-reinforced-rod-bearings-honda-b18a-b20a-sohc","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}