Chief and Murder Nova go head to head; Farmtruck and AZN enter a lawn mower drag race; Chief enacts new rules; Reaper and Shane get heated as they try to distance themselves from Jackie Knox and his Sonoma.
Shark Pool's popularity creates a need for Chief to host two race nights; Henson, Your Mom and Chuck 55 all show up to challenge the gatekeeper; Chief and Shawn race for the top spot.
Daddy Dave returns with Henson's corvette ``Plan B,'' along with new mother Tina Pierce and Boosted GT; Farmtruck & AZN get a ``ricer''; the rivalry between Jackie and Shane intensifies.
Chief decides to get a new car while the battle for top list spots gets cutthroat. Doc takes another shot against #1 Shawn, Monza faces Reaper, Dave needs to get past Shane and new shark, Jeremy, must face the Farmtruck to get on the list.
Chief unveils his new ride, The Crow-mod. Shawn challenges Doc, while Reaper races Monza. Farmtruck and AZN race the Dung Beetle against a car called "Bug killer." Fights break out between Dave's team and Reaper on race night.
Chief faces post-crash PTSD as the Crow-Mod and Farmtruck go for spot 10; rookie Jeremy challenges Dominator to get spot 6; Reaper and Shane compete for spot 5; Shawn takes another shot at spot 1.