Made an upgrade of the 9398 with XL motors and gave it 30% more additional parts. This is my MK2 version as my first upgrade was not as successful. Also it uses
LEGO Technic: All-Terrain Vehicle Off Roader Truck Toy (42139) Toys - Zavvi US
LEGO TECHNIC: 4x4 Crawler (9398) for sale online | eBay
LEGO MOC RC ☆ Βatman Tumbler LEGO 76240 UCS ☆ Motorized and remote controlled with power functions from LEGO 9398 Crawler ☆ Batmobile from the Dark Knight by reckless_glitch | Rebrickable - Build with LEGO