is a manga series created by Tetsuhiro Koshita, first serialized in Shogakukan's CoroCoro Comic magazine from July 1994 to October 1999. The manga centers on Rettsu and Go Seiba, brothers who focus on the world of miniature car racing known as Mini 4WD. It is created as a tie-in to Tamiya's Mini 4WD franchise (mainly Fully Cowled, Mechanical and Aero), and is the second series to center on the franchise since Dash! Yonkuro.

Three anime adaptations of the manga were produced by Xebec from 1996 to 1998, each of which consisting of three 51-episode series, and was also made into several games. The series also released various merchandise, including CDs, trading cards, stickers, and even die-cast cars. In 2014, a sequel series, Return Racers, began serialization in Shogakukan's CoroCoro Aniki magazine, 20 years after the original series' serialization. A spin-off manga, which focuses on Tsubasa, was serialized on CoroCoro Ichiban in 2017.

Plot Mini 4WD racing is a hobby where kids and adults compete using customized motorized miniature cars. Every year, competitions revolving around the hobby circulated around the world, where kids and adults test out their spirit and passion for racing, with companies developing new technologies and innovations for Mini 4WD cars. The story revolves around the competitive Seiba Brothers: Go and Rettsu, who were once constantly arguing with each other to see who between them is the best racer. One day, however, after a community-sponsored race they both met Dr. Tsuchiya, the head of the Tsuchiya Racing Factory who gave them two Mini 4WD Cars from the prototype Saber Series: Sonic Saber and Magnum Saber. With his advice to customize them for the upcoming race, they are now determined to win, race to victory and set off on the wildest race of their lives while meeting both friends and enemies in the Mini 4WD Racing world.

Characters TRF Victorys

Go is one of the two title characters. He is Rettsu's younger brother by one year, and is in the fourth grade. Go is initially depicted as rash, impulsive, careless, and impatient, but on some occasions, he can be calm, kind and gentle. He is usually seen wearing goggles, but they are more of a fashion accessory as they are on his forehead most of the time as opposed to covering his eyes. His primary color is blue, which is the color of his hair, eyes, gloves, and boots. His cars, the Magnum series, are all known for their speed. In Return Racers, Go has retired from Mini 4WD racing and is now a professional racing driver. In his private life, he drives a BMW Mini convertible. He met a boy named Tsubasa, who became his protege at his will as Tsubasa intends to follow Go's legacy as a Mini 4WD racer.

The other title character, Rettsu, is an eleven-year old fifth-grade student, and Go's older brother. Although he is able to control his patience better than his brother, he still lets out his annoyance with someone once in a while, especially those who anger him. Rettsu sports a green hat as his trademark. His primary color is red, which is the color of his hair, eyes, gloves and shirt. Rettsu is charming, kind-hearted, and sweet. Although he and Go are siblings and team up together, they often argue a lot. All of his Mini 4WD cars, the Sonic series, are well-rounded and have great off-road capabilities. The Seiba brothers are known as the . In WGP, Rettsu is the captain of the TRF Victorys. In Return Racers, he is working in the Space Development project on recommendation of Dr. Tsuchiya.

Ryo is a nomadic wanderer who, with his brother Jiromaru, lives off the land. When he first meets the Seiba brothers, he quickly becomes their rival, particularly that of Go. Eventually though, he becomes a friend of the Seiba brothers, as well as a member of the TRF Victorys. It is later revealed that Jo from Astro Rangers had crush on him because Ryo saved her once. It was once shown when the Astro Rangers coach asked Dr. Tsuchiya where Ryo lives because one of them seems to have some feeling toward him.

Tokichi is a spoiled rich boy, whose father is a well-known entrepreneur. He is in fact the heir to the Mikuni Corporation. When he first meets the Seiba Brothers, Go takes an instant liking to him, most likely because of his wealth. His family owns an arcade, which is always the hot spot for kids and instantly attracts Go. When speaking, he pronounces "desu" (です, meaning "is" or "to be") as "degesu" (でげす). His cars emphasize on technical cornering ability. Tokichi also likes to make his entrances in the manners of stereotypical rich kids, such as jumping out of a helicopter, arriving in a limousine, and surrounded with an entourage with great fanfare.

Initially a battle racer in the Ōgami Corps, trained under Dr. Ōgami, J later finds enjoyment in regular racing with the Seiba brothers. Because of this, he decides to leave Ōgami Labs, renouncing the anything-to-win attitude instilled by Dr. Ōgami, and goes to live with Dr. Tsuchiya in his laboratory as an assistant. As a result, he also gradually changes in his personality, turning from an introvert into a high-spirited boy. Of all the other team members, J is the most skilled technician and mechanic, having prior experience with computers and machines while under Dr. Ōgami's training. These skills are shown on many occasions, namely when he repaired the damaged Tridagger X to repay Ryo for damaging it in a previous race, when he helped Go design and build the Cyclone Magnum and when he designed the Proto Saber EVO. He appears to be best friends with Go.

Jirōmaru is Ryo Takaba's younger brother. He likes Ryo a lot, and follows him around everywhere. His cars, the customized Saber 600, are constantly damaged in races. In episode 10 of the WGP season, Jirōmaru substitutes Ryo after his leg is injured.

The head of the Tsuchiya Racing Factory, Dr. Tsuchiya is the owner and pioneer in the Mini 4WD development, with half of his inspirations coming from his experience with jet planes, both as a pilot and an engineer, as shown in his lesser-seen parts of his labs. It is also where he found the inspiration to create the Super Avante, the prototype used for all the Saber series of Mini 4WD cars, but he has ongoing conflict in ideals against Dr. Ōgami as the story progresses. He is named after Hirotsugu Tsuchiya, a Tamiya employee.

Ichimonji Brothers

One of the two main characters of MAX, Gohki is Retsuya's older brother. He is a former Battle Racer at Borzoi School until he and his brother quit due to their conflicting ideals between him and the academy itself. He aims to become a true Mini 4WD racer with his brother to clear his reputation. He is currently living in a workshop owned by their uncle, who is working for GEN Manufacturing. Despite his rustic behavior, he has a good heart and values the spirit of Mini 4WD racing. He is also shown to be good on mechanics.

The other main character of MAX, Retsuya is Gohki's younger brother. Like Gohki, he is also a Battle Racer at Borzoi School and is a good in racing, but like his brother, he also left the battle racing scene and decided to change for the better. He is currently living in a workshop owned by their uncle, who is working for GEN Manufacturing.

Ogami Corps

The head of Ogami Corps, Ogami is introduced as the rival scientist to Dr. Tsuchiya. He advocated battle racing, where racers are encouraged to install weapons to their Mini 4WDs and destroy their opposition during races. He worked with Dr. Tsuchiya in the past, but split due to disagreements in their beliefs about what Mini 4WD racing should be. He owns a large laboratory hidden in a volcano, where his cars are developed. He has a daughter named Marina. In MAX, he worked with Dr. Ichimonji as a scientist at Borzoi School to create a new machine. He is also shown to not wear his headgear anymore and uses a cane to help him walk. At the end of MAX, he throws away his beliefs of battle racing after seeing that his daughter Marina refused to use the weapons installed into her machine, Phoenix Stinger, in the final parts of the M1 race.

The daughter of Dr. Ogami, Marina appears in MAX. A skilled Battle Racer and Mini 4WD racer, she owns the Fire Stinger, a successor to the Ray Stinger developed by her father. Though she usually lives in a private condominium with high expenses every month, her private life remains a mystery even to the Ichimonji brothers. She is also a regular in the onsen house "Matsunoyu". She later joins to the Borzoi School after being reunited with her father and her machine being upgraded to the Phoenix Stinger.

Kai is the first of the Ogami Corps' three battle racers to appear. His car, the Beak Spider, caused a massacre of Mini 4WDs around city parks, where they were secretly damaged, much to ire of their owners. Following the Summer Great Japan Cup, he is shown to develop rivalry with Ryo. In the WGP anime, he appears as the coach of the Savanna Soldiers team, where the team members (led by Juliana) use a modified version of his car dubbed Beak Zebra.

One of Ogami's battle racers, Gen is the owner of Brocken Gigant, a front-motor Mini 4WD that possesses the ability to perform a wheelie to stomp and destroy a rival car. He was the one who destroyed Go's Victory Magnum in the manga version.

One of Ogami's battle racers and the only female member of the trio, Rei is the owner of the Ray Stinger, a Mini 4WD with laser control and a needle to attack her opponents' cars. In the anime, she was the one who destroyed Go's Victory Magnum in a mid-air surprise attack. In the Power WGP2 game, she joins to the Les Vainqueur team, under the disguise of .

NA Astro Rangers

Born in Washington, D.C., Brett is the captain of the NA Astro Rangers. His hair color is blond and he wears a black T-shirt, a red jacket, visor goggles and black pants with a belt. While he seems to be cool, strict and snobbish, Brett is at heart caring and kind.

Born in Los Angeles, Edge is an outgoing and cheerful guy, as well as a member of a Los Angeles soccer club. He is shown to be very emotional, but he can control his anger.

A young, ponytail-haired girl born in New York City, Josephine is kind and friendly to everyone, except for Rosso Strada. She does not like to be underestimated, and is quick to anger. Jo has feelings for Ryo, as he saved her from a jet-ski accident.

Born in Salt Lake City, Michael is the youngest member of the team, as seen with his physical appearance of an elementary student similar to the Seiba brothers. He may be small, but he is smart and skilled.

Born in San Francisco, Hammer D is the tallest and oldest member. Like Jun, he likes to play baseball, and when bad things happen, he begins to worry a lot and cannot concentrate. Because of this, he is learning to focus himself.

Other racers

Jun has been a friend of the Seiba brothers since they were very young. She is an ace pitcher in baseball, and plays for a team named . At first, she is a novice at Mini 4WD racing, but improves in her skill through the influence of the Seiba brothers and others. In Return Racers, she develops some romantic feelings for Go, but decides not to confess because she knows that Go has a crush on her friend, Chiko. Jun's name, combined with those of Rettsu and Go, is a reference to , the stage name of Japanese comedian Yoshiji Watanabe.

Makoto is a regular racer whose determination can nearly overcome the Seiba brothers in the Winter GJC qualifying cup. He is the first named rival to the Seiba brothers and his friendly attitude allows him to be friends with the protagonists. His performances are not as shining as other racers, but his determination and luck allows him to win the Winter GJC. He does not appear much in races after the introduction of Kai Okita and Ōgami's battle racing rule. He is a part of the Super Great Japan Cup's 12 racers.