After round one of Cash Days in OKC, 16 drivers are left to compete for the grand prize of $50,000, and the 405 is proud that half of them are OKC racers; the street proves to be slick, and it's not clear that the risks outweighs the reward.

Thirty-two of the fastest racers from around the country gather in OKC for the biggest street race of the year, Cash Days; with $50,000 on the line, all the racers are prepared to push their cars to the limit to try and win it all.

Chief decides to put on a team race-off where Detroit, New York and California each bring a team to compete against OKC; five of the 405's racers step up to prove that OKC has the fastest group of street racers in the country.

Chief decides to put on a team race-off where Detroit, New York and California each bring a team to compete against OKC; five of the 405's racers step up to prove that OKC has the fastest group of street racers in the country.

Big Chief hosts a "Cash Days," where 32 cars compete; the racers try to determine who is the fastest in the nation.

Big Chief hosts a "Cash Days" where 32 cars compete; the racers bring the heat in hopes of being the fastest in the nation.

Witness the underground world of street racing like never before as racers hit the local streets across America.

Rebel racers take to the streets in Texas, Michigan and Missouri.

The time for Mega Race 2 arrives, and the racers from "Fast N' Loud" and "Misfit Garage" join the show's racers in Arizona for the big event; the guys do anything to win in the battle between Oklahoma and Texas.

Farmtruck and AZN and the Misfits complete their builds and make some test hits, but teams struggle with technical issues which must be corrected; Ryan arrives in Phoenix along with 405 racers, while the Gas Monkey crew heads to Arizona to race.

The last list race of the season, as everyone in the 405 looks to make one more move towards the top; some of the top guys don't bring their cars on race night; plans to move up the list blow up in Doc's and Chief's faces.

AZN gets a new tune for the Dung Beetle and tests out the improvements; Chief pounces on his chance to make big moves up the list when Doc gets into trouble.

Chief and Shawn map out a plan to get themselves back into the top spots; Farmtruck sets AZN up with a race against a doctor with a super car; Doc seems like he finally has his car figured out.

Memphis versus NOLA; when an MSO racer runs off the road, the teams barrel into Round 2 knowing any mistake can be deadly; JJ and Kye Kelley fight to get control and win $100,000 and the Fastest in America title.

Teams NOLA and Detroit move into the second round of the final battle to see who will race Memphis for $100,000; Chucky Davis tries to dominate the night, while Kye Kelley makes a risky decision that could send his team home.

After weeks of racing, only Detroit and NOLA remain fighting for a chance to race Memphis for $100,000; Chucky plans to keep Kye in the rearview with a new strategy to take the lead, while Kye is confident his heavy hitters can take out team Detroit.

The fast-paced feud between Detroit and South Carolina continues and Motor City brings more power than their cars can handle; Block's team tries to take advantage of Detroit's mistake, and the race comes down to the wire.

The second match of round two pits Chucky and his team from Detroit against Chris Block and his South Carolina racers; tensions have been mounting since the duo's scuffle at the last chip draw, and the $100,000 pot is fanning the flames.

In the second round, Chris Rankin and the Northeast face off against Kye Kelley and his New Orleans' crew; the North won't be counted out yet, but they'll need to dig deep to outrun and outgun the South.

Only four teams have survived to the second round of the biggest street race in history; Street-smart Chris Rankin and his Northeast crew go head-to-head against upstart Kye Kelley and his New Orleans' crew.

The final match rages on between the racers from Mississippi and the big-mouth, bigger-horsepower team from Detroit; the Motor City boys think the win is in the bag, but a surprise comeback from Richard McCarver keeps the South in the game.

Episodes of "Street Outlaws" with additional content.

"Street Outlaws" gained traction with viewers by glamorizing activities on the road and behind the scenes of street racing enthusiasts in Oklahoma City. Now, with underground leagues "exploding across the country and taking new forms," says Discovery Channel, the network expands its docuseries to focus on fledgling teams in New Orleans. Following the pavement scorched by their Midwestern brethren, street racers in the Big Easy band together to prove they are the fastest in the country.

This spinoff of "Street Outlaws" is set on the mean streets of Memphis, Tenn., where fast-talking, bet-taking JJ Da Boss and his family and friends have ruled the underground racing scene for decades. Pride and honor define Team Memphis, despite JJ being well-versed in the art of hustle. They are "trying to beat ya, not cheat ya" and all challengers are welcome to take on a family that rarely fails.

Buying diesel trucks headed for the scrap heap and giving them new leases on life has turned into big business for the Diesel Brothers. Led by Heavy D and Diesel Dave, the crew works hard and plays harder as they trick out the trucks for use in elaborate pranks and stunts, all of which becomes a marketing tool on social media. Millions of hits later the company is known as the destination for diesel lovers who are looking for custom builds, crazy stunts, pranks and hilarious antics.

"Full Throttle" presents episodes of "Street Outlaws: Memphis" that include additional, never-before-aired content. The series is set on the mean streets of Memphis, Tenn., where fast-talking, bet-taking JJ Da Boss and his family and friends have ruled the underground racing scene for decades. Pride and honor define Team Memphis, despite JJ being well-versed in the art of hustle. As he is "trying to beat ya, not cheat ya," JJ welcomes all challengers to take on a family of racers who rarely fails. In a world full of big characters with colorful histories on and off the track, JJ and his crew count on each other to get from A to B.

Desert Valley Auto Parts in Arizona doesn't merely sell original parts to car collectors and restoration junkies. The McClure family business certainly can do that all day long, what with more than 10,000 rust-free vehicles parked at their 100-plus acre facility. But what really gets the McClures and their crew excited is finding cars to restore themselves, and sometimes they are located right on their lot. After getting them up to speed and back on the road, they sell them at auction.

Richard Rawlings and Aaron Kaufman deal in rusty gold. The proprietors of Gas Monkey Garage in Dallas buy, restore and resell forgotten, derelict American cars, everything from 1931 Model A cars to '73 Trans Ams. As "Fast N' Loud" shows, Rawlings is the mastermind, a deal-maker with an eye for relics worth their efforts, and to find them the guys search barns, fields and auctions across the U.S. Kaufman manages most restorations. He's a fabricator and self-taught mechanic, whose techniques and design skills first endeared him to Rawlings and kick-started the partnership. At the end of Season 12, that partnership ended when Kaufman exited Gas Monkey, leaving Rawlings as the series' sole star.

Located on the outskirts of Las Vegas, Steve Darnell and his band of oddballs and misfits create one-of-a-kind, Mad Max-style rat rods. With the demands of their quirky customers, the team at Welder Up strips and rebuilds vehicles from hidden treasure. In each episode, the automotive fabricators use their imaginations and creativity to create a unique vehicle for each unique owner. With details ranging from a shotgun gearshift to horseshoe gas pedals, the crew transforms discarded treasure and performance parts into bizarre, eccentric and truly one-of-a-kind rolling works of art.

Two ideas producers seem to consistently rely on for reality TV programming are shows about refurbishing and "flipping" cars, and shows about auctions. (Oh, and don't forget to add "Wars" to the program titles ... because it's all about the battle on reality TV!) "Texas Car Wars" combines both of those plot points. It follows the risky bidding wars waged at car auctions among four auto shops in Texas, where there are more unregistered, salvaged cars than anywhere in the country. The series then reveals how the shops' employees try to turn the junkers they purchase into jackpots by fixing them up for resale.

It takes a lot of nuts and bolts, so to speak, to challenge Richard Rawlings and his crew at Dallas hot rod shop Gas Monkey Garage. But that's what mechanics Tom Smith and Jordan Butler are fixin' to do by opening a rival shop with fellow car pros Thomas Weeks and Scot McMillan. The venture, Fired Up Garage, is their chance to go toe-to-toe with powerful Gas Monkey -- featured in Discovery's hit series "Fast N' Loud" -- and prove that they have what it takes to run a car business. Smith and Butler have extra motivation, too: They worked at Gas Monkey before a series of mishaps forced Rawlings to fire them.