Bigfoot 23 is a custom monster truck built by Bigfoot 4x4 using a PEI Chassis that was first fired up in 2023. The truck is only one of three in the Bigfoot fleet (alongside Bigfoot 19 and Bigfoot 24) to use a Chevrolet-based Merlin engine, Patrick axle housings, and Clark planetary corners. It made its event debut at the Hot Wheels Monster Trucks Live stop in Kansas City on October 7, 2023, running as Gunkster. It is the second newest chassis in the Bigfoot fleet.