B-M-W S63B44 Engine x5m x6m m5 m6 4.4E71 v8 Engine New Remanufactured
Discover the B-M-W S63B44 remanufactured engine, a high-performance V8 designed for X5M, X6M, M5, and M6 models. This 4.4L twin-turbo engine delivers 555-600+ hp, rebuilt to exceed OEM standards with upgraded components. Enjoy cost savings, warranty, and plug-and-play fitment for a seamless upgrade.