✔【16 x Rocker Arms with Bolts】The Rocker Arms with Bolts, Manufactured to OE specification for fit, form, and function,have been inspected before shipment in the factory,can fully fit original car directly. Offering the quality, reliability, and durability. ✔【REPLACE OEM#】REPLACES: 10214664,12681275, 180-1337, 12669993,MR-1341. Absolutly 100% Brand New.Please refer to the "amazon confirmed fit" tool at the top of the page to see if the parts fits your car. ✔【Fits】This Rocker Arm with Bolt Kit Compatible with 1998 to 2020 4.8L 5.3L 5.7L 6.0L 6.2L Cyl Engines.Compatible with Avanti ll, Bui-ck All-ure/ LaCrosse/ Rainier, Cadi-llac Escalade/ CTS/ Escalade ESV/ Escalade EXT, Chev-rolet Avalanche/ Avalanche 1500/ Camaro/ Caprice/ Colo-rado/ Corvette/ Express/ Silverado / Suburban/ Tahoe/ SS/ SSR, GMC Can-yon/ Envoy/ Savana/ Sie-rra/ Yu-kon, Pon-tiac Fire-bird/ Grand Prix/ GTO & more detailed vehicle adaptation information please see below. ✔【When】Common symptoms in bad rocker arms or hydraulic tappet include cracks or wear, strange noises(When you start the engine you will hear the Clicking or Ticking Noises) or loose , Engine Light On or Stalling etc. ✔【Why】This Lifter & Rocker Arms can help you resolve problems such as poor acceleration, decreased power or abnormal noise.Please replace it as soon as possible to avoid further damaging your engine. In time to ensure the reliability of the vehicle and the safety on the road. ✔【Premium Support】Easy-To-Reach Customer Service. We focus on product quality and customer service, our customer service is first-rate. We can provide 100% satisfaction.