The ACL Race Con Rod Big End Bearings 4B1972HX-STD are high-performance engine parts designed for specific car models such as the K-series (K20A2, K20Z1, K24A, K24). Made in Australia, these bearings offer a 1-year manufacturer warranty and come in a set of 8. They are specifically designed for each car model, ensuring a perfect fit and optimal performance. Perfect for those looking to upgrade their engine with reliable and durable components, these ACL bearings are a great choice for enhancing the performance of your vehicle.