Big Bro Bus Diesel Brothers : Season 4 Episode 1
TV-14 Discovery 42m int(0)
Aired: July 30th, 2018 @ 8:00 PM EST on Discovery
A new client asks for the biggest build yet: a monster school bus capable of driving over sand and water. Later, the Muscle brings in his own client build for a gym buddy, a Raptor-style F250.