{"product_id":"acl-race-rod-bearing-set-nissan-sr20det","title":"ACL Race Series connecting rod bearings for Nissan SR20DET","description":"\u003cp\u003eACL Race Series connecting rod bearings for Nissan SR20DET (part number 4B2960H), designed for engines that will operate under much higher loads and higher RPMs than stock.\u003c\/p\u003e\u003cp\u003eInternally, they feature three layers on a high-strength steel backing: a copper-lead-tin lining, a thin nickel barrier, and a lead-tin-copper sliding layer, which is the one that works against the crankshaft. In the connecting rod bearings, the surface layer is thinner to better withstand fatigue.\u003c\/p\u003e\u003cp\u003eThe Race Series have more crush and a somewhat more eccentric shape than standard bearings, two details designed so that the bearing does not shift and remains well-lubricated when the block and the connecting rod deform under load.\u003c\/p\u003e\u003cp\u003eIn standard size, ACL specifies them for a rod journal of 47.956 to 47.974 mm, with a bearing width of 17.1 mm. For that diameter, it recommends an oil clearance of about 0.051 to 0.061 mm, measured with a micrometer and a bore gauge. If the crankshaft is reground, the measurement changes.\u003c\/p\u003e\u003cp\u003eThey do not have the silver-tin final coating of standard bearings, so their dark, brownish-black-bluish color is the factory finish and does not indicate any defect. ACL advises against polishing the bearing surface to adjust clearance; if more is needed, they are combined with the HX version, which provides an additional 0.025 mm of clearance.\u003c\/p\u003e\u003cp\u003eIf the crankshaft is reground or you do not know which size you need, contact us with your engine code before ordering.\u003c\/p\u003e","brand":"ACL","offers":[{"title":"Default Title","offer_id":50813076308302,"sku":"ACL-4B2960H-STD","price":59.88,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/acl-coussinets-sr20det.jpg?v=1735903577","url":"https:\/\/driftandgrip.com\/en\/products\/acl-race-rod-bearing-set-nissan-sr20det","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}