Season 4

Fresh off their huge win against NOLA, JJ Da Boss and the MSO hit the streets after getting called out by Quinn Shireman and his team. Quinn has a big mouth and the fast cars to back it up, forcing the MSO to go all hands on deck for a win.

Race night against the Kentucky racers continues with JJ throwing a curveball and Kentucky falling behind. A face-to-face confrontation emerges on the course and tempers are boiling out of control but MSO is determined to prove why they're the best.

Race night gets rowdy when Memphis welcomes a new racing group from Virginia. The newcomers talk a big game but run out of cars after only a few races, leaving Molly and Ole Heavy without a race until Virginia can fix their cars and return.

The Memphis family loads up their cars and heads to Battlefield Dragway in Mississippi for one of JJ's famous arm-drop competitions. Thirty-five small-tire-car racers begin round one in this exclusive event, but only one will take home the grand prize.

JJ gets a callout from Chris Bromley and his Fox-Body Mustang drivers from Massachusetts. Chelsea is excited to race her new car and Molly is out for redemption but technical difficulties make it hard for the MSO to prove they can outrun any Mustang.

JJ invites 32 racers from all over the country to compete in Street Wars -- a winner-take all event with a grand prize of $10,000. The competition is open to all, even those with pro-mods, so the MSO must focus if they want a shot at the prize.

MSO gets called out by Ronnie Pace and his team from Texas. It's not long before Memphis begins feeling the heat up against Ronnie's Texas-sized mouth and deep pockets, leaving it up to the more inexperienced racers to bring the MSO back into the black.

Tricia and JJ both have chances to redeem themselves while Memphis continues to struggle against Texas. The competition is more intense than ever and one wrong move could mean it's game over for the Memphis crew.

The MSO heads to St. Louis to race the slick streets against a team of even slicker racers led by Dynamite Dave. Memphis came out on top the last time these teams faced off, now the St. Louis crew is ready to even the score on their home turf.

After a grueling night against St. Louis, MSO gets a callout from some OK Racers who want to challenge Memphis on the same sketchy street. JJ and the crew aren't ready to back down but they must rally to make staying out another night worthwhile.

As their battle with Chicago approaches, the MSO scrambles to fix Heifer after losing her to a fender bender. JJ finds a '65 Malibu they can use but Chicago is stacked with fast cars and street sense, so running an unknown may be out of the question.

MSO prepares to face off against some local racers led by the fast-talking Tony Yeager. Tensions are high thanks to MSO’s history with their competition that includes some unfinished business between Mustang Mike, Anthony Smith and two of the locals.

The MSO steps up to the challenge after larger-than-life Chris Block challenges them to switch to small tires and compete against South Carolina. With little time to prepare, Memphis must quickly adapt or risk losing to Block's mind games.

The MSO starts the season off with a big plan to only race on small tires. Not everyone on the team has small-tire experience, so Memphis will have to work together to overcome a challenge from Tim White and his small-tire killers from Illinois.

First, Tim White from Illinois revisits Memphis with a big surprise. Afterwards catch the underground scene as racers hit the local streets during Race Night In America.

Quinn Shireman, longtime rival of the MSO, invites the team to Kentucky for an event like no other. Quinn bets JJ that the MSO can't win and brings with him a team of heavy hitters to make sure no one from Memphis has a shot at the cash prize.

JJ's Arm Drop event in Kentucky continues and the MSO is still struggling to knock out Quinn's hired guns. The stakes are high and if Memphis cannot manage to win the entire event, they'll lose their side bet with Quinn and go home in the red.

Tony Yeager and Whitfield roll into town with a group of local Donk-driving racers ready to call JJ out. The familiar foes have a plan to get inside JJ's head by going after the girls and hopefully pull out a win against the MSO.

Now that his team is on small tires, JJ puts them to the test by inviting the country's best small-tire racers to Memphis for a race with a $16,000 pot. Big-name foes are in town so it's up to the MSO's heavy hitters to bring home a win.

The second round of JJ's small-tire race kicks off with the MSO fighting for a win despite only having half of their team remaining.

Nashville racers call out the MSO to prove who are the kings of Tennessee.

The MSO is called out by a team of revenge-hungry all-stars from around the country that have suffered losses at the hands of Memphis; bonus content.

The MSO continues their battle against an all-star group of racers out to avenge past losses on the streets of Memphis. Then NOLA makes moves on the 405 and Lizzy Musi joins Grudge Night for the first time.

The MSO family heads to Vegas to meet a group of West Coast racers.

Racers that have beaten the MSO are challenged to a rematch.

The second night of racing against teams who have beaten the MSO continues.

after a season of battling small-tire pros from all over the country, JJ has the MSO facing off against the best small-tire racers he’s ever seen -- themselves! Each matchup is designed to improve individual weaknesses and get them even closer to the top.