NASCAR Mexico T4 Series

The Reto Neon ceased to exist in 2004, when the Desafío Corona series was founded. OCESA, the promoter of the new series included the Dodge Neon cars as one of their three categories, with the stock car series (now NASCAR Mexico Corona Series) being the premier series. The former Reto Neon became the T4 Series starting in 2005. In the inaugural season it was known as Lotto T4 Series, after the Italian sportswear firm decided to sponsor the series for that year.

In 2006, when it was made evident that NASCAR was considering to include the Desafío Corona as one of their international divisions, the T4 Series underwent several changes as it was adapted to the NASCAR format. The most notable changes were the introduction of pit stops, the allowance of only one driver per car, and a schedule that consisted entirely of oval tracks. In addition to this, standard NASCAR rules, such as the beneficiary rule (commonly known as "Lucky Dog" or "Free Pass"), green-white-checker finishes, and double-file restarts established. Also, it became a multi-manufacturer series, with the inclusion of the Chevrolet Astra in addition to the Neon.

The creation of the NASCAR Mexico Corona Series was announced at the 2006 awards ceremony. The T4 Series was confirmed as the supporting series and was renamed to NASCAR T4 Series, the series ran during 10 of the 14 NMCS weekends.

A period of transition started in 2007, with the release of a new car spec. The new "Mini Stock car", as it is called, is a Rear-wheel drive car (as opposed to the FWD Dodge Neon), and it features most of the elements of the larger stock cars (such as transmission, suspension, brakes, etc.), while keeping the 4-cylinder engine.

In theory, the Mini Stock car is designed to offer a performance very similar to the old T4 chassis. While teams are being encouraged to switch to the new car, those not wanting to do so are being grandfathered in the series.

The series changed name to NASCAR Mini Stock Series and the period of transition came to an end and all of their cars have changed to the RWD regulation. In 2010 was the first year of the Nissan in the series.

The series was folded after 2010 season, and was replaced by NASCAR Stock V6 Series, the cars also increased to six-cylinder engines.

The series kicked off the 2007 season at the Autódromo Miguel E. Abed in Puebla. The schedule consists of 10 races, all of which will serve as the opening for double-feature race weekends along with the NASCAR Mexico Corona Series.

Date	City	Track	Winner
April 1	Puebla	Autódromo Miguel E. Abed (Oval)	Rodrigo Echeverría
May 20	San Luis Potosí	Autódromo Potosino (Oval)	Irwin Vences
June 3	Mexico City	Autódromo Hermanos Rodríguez (Oval)	Giovanni Rodrigo
July 15	Querétaro	Autódromo de Querétaro (Road course)	Javier Fernández
August 12	San Luis Potosí	Autódromo Potosino (Oval)	Javier Fernández
September 23	Puebla	Autódromo Miguel E. Abed (Oval)
October 13 ‡	Guadalajara	Trióvalo Bernardo Obregón (Tri-oval)
October 14	Guadalajara	Trióvalo Bernardo Obregón (Tri-oval)	Javier Fernández
October 28	Querétaro	Autódromo de Querétaro (Oval)
November 4	Mexico City	Autódromo Hermanos Rodríguez (Oval)

‡ The first race at Guadalajara was rained out on July 29 and was postponed to October 13.

• All races are held in Mexico.