{"product_id":"ls1-rocker-arm-with-upgraded-trunnions","title":"LS1 Rocker Arm with Upgraded Trunnions","description":"The Michigan Motorsports LS1 Rocker Arm with Upgraded Trunnions Installed is a single, direct replacement rocker arm designed to enhance LS engine valvetrains. This component is professionally upgraded with premium 8620 steel alloy trunnions and caged roller bearings, replacing the weaker factory-style needle bearing design that can lead to engine damage. It is engineered to directly replace GM part numbers 12681275 and 10214664, making it an ideal choice for replacing a single damaged rocker arm or upgrading individual rockers during valvetrain service without needing to purchase a full set.\n\nThis rocker arm comes pre-assembled with the trunnion upgrade, saving installation time and ensuring a more reliable rebuild. The use of a durable 8620 steel alloy trunnion with caged roller bearings provides superior strength and longevity compared to stock needle bearings. This upgrade helps mitigate the risk of catastrophic failure, where factory needle bearings can scatter debris throughout the engine, potentially damaging critical components like the oiling system and internal bearings.\n\nThe Michigan Motorsports LS1 Rocker Arm is suitable for a wide range of applications, including daily drivers, stock rebuilds, and performance builds such as camshaft upgrades, cylinder head upgrades, turbo builds, and other aggressive LS combinations. These rocker arms are the same type trusted in Michigan Motorsports' high-horsepower turbo engine builds, offering proven reliability and strength for demanding applications.\n\nIt is crucial to verify your specific cylinder head and rocker arm style before purchase to ensure proper compatibility.","brand":"Michigan Motorsports","offers":[{"title":"Default Title","offer_id":52689107255608,"sku":"10214664","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687383026.jpg?v=1784901997","url":"https:\/\/store.motormia.co\/products\/ls1-rocker-arm-with-upgraded-trunnions","provider":"MOTORMIA","version":"1.0","type":"link"}