In 2004, Bowyer began by finishing 8th in the ARCA Remax series race at Daytona in the #7 Advanced-sponsored Chevrolet for Gerhart. In 2004 Bowyer began running in the Busch Series for Childress, sharing seat time in the #21 Reese's-sponsored Chevrolet with Kevin Harvick. He drove in half of the 34 Busch Series races that year, winning one pole and seven top-tens, attaining a season-high 3rd-place finish in the Federated Auto Parts 300 at Nashville Superspeedway in June.
He also ran three races for Kevin Harvick Incorporated with help from Andy Petree Racing with sponsorship from Monaco Coach.
Bowyer made two starts for Bill McAnally in the Camping World West Series in the #20 Chevrolet. In his two starts at Phoenix & Auto Club Speedway, he won 1 pole and had a best finish of 2nd.
However, Petree wasn't quite done. His longtime friend, John Menard convinced him to look at John's son, Paul Menard, who impressed Petree He signed him to a contract quickly.
Paul made his debut in the #55 Menards Chevy at Nashville Superspeedway, Petree's first career Busch race as an owner. It was a productive race, as Paul finished 12th.
After finishing 14th at the next race at Kentucky Speedway, Petree allowed Menard to make his Cup debut at Watkins Glen International (after Paul had DNQd at Infineon).
That race at the Glen would be Petree's last Cup race. The next week, Paul grabbed his first top-10 at IRP. Petree, who had made some Craftsman Truck Series starts, decided to put Paul in some Truck races. Menard drove the #33 Menards truck in 5 races and finished with one top-10, an 8th place at Kansas.
Bowyer's first full Busch season was in 2005, replacing Ron Hornaday in the #2 ACDelco-sponsored Chevrolet. He won two poles and two races en route to a second-place finish to repeat-champion Martin Truex, Jr., losing by only 68 points. He also made his NEXTEL Cup debut in the #33 Sylvania-sponsored Chevy on April 23, 2005, during the Subway Fresh 500 at Phoenix International Raceway.
He finished 22nd as the first car one lap down.
In 2014, four-time Champion Ron Hornaday was signed to drive the season opener at Daytona, with Rheem sponsoring his efforts. Hornaday finished 5th after starting 2nd. Hornaday and the 30 team ended up attempting the full season on a race-to-race basis, with Rheem sponsoring "any of Ron's races that (the team) were unable to find backing for." He was running third in points following Bristol when TSM announced that it would not run Hornaday and the 30 at Canadian Tire Motorsport Park.
On September 2, TSM further announced the shutdown of the No.