Gap Vax, the manufacturer of industrial vacuum trucks, commissions a bike from OCC to be revealed on Gap Vax's 25th Anniversary. Just as the guys are getting started on the chopper, Jersey Shore's Pauly D makes an unexpected visit to OCC, asking Paul Senior to build him a bike for a charity he's supporting. With the deadlines looming for both bikes, the guys work hard to finish the builds on time. The guys also manage to pull what they believe to be the ultimate prank on Senior.