Alright, for you DIY mechanics out there - these rocker arms are exactly what you need for your Hyundai or Kia with 1.8L or 2.0L engines. They're direct replacements for OEM part number 24551-2E001 and fit models like Elantra, Tucson, Kona, and Sonata. The set comes with all 16 pieces you need, and they're made from quality metal materials that are durable and not prone to damage like some cheaper alternatives. Installation is pretty straightforward if you know your way around an engine. These rocker arms are crucial for proper valve operation - they ensure precise opening and closing, improve engine efficiency, reduce noise, and help extend your engine's life. Each piece is tested before shipping, and the seller has over 10 years of experience in auto parts. Just make sure to double-check that this part number matches what you need for your specific vehicle model and year. If you're unsure, they're really responsive to questions through Amazon messages. Solid replacement parts that won't let you down!