Yesterday, Johnson cut his first Supercars laps with the Shell V-Power Racing Team at the squad's home track, Queensland Raceway.
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The teenager currently leads the Promaxx Performance Exhausts TA2 Muscle Car Series and is 15th in the Turtle Wax Trans Am Series.
Supercars, however, is the ultimate goal.
“I want nothing more than to try to continue what both Dad and Granddad have done, and I know I have got to put the work in to get there,” said Johnson.
“I have got to put in 110 percent and try to stand out more than anybody else, so I'm going to do what it takes to get to Supercars really.”
Steve Johnson twice drove with his father in the Great Race in 1998 and 1999, ending his 15-year full-time Supercars career with three wins and 16 podiums to his credit.
“Well look, it won't happen unless he earns it,” said Story of the youngest Johnson.
“We hire the best drivers we possibly can but at the rate that he's going, if he continues his success, he's got a very bright future ahead of him.
“The thing that I really respect about Jett's racing is that he hasn't been pushed into it; it's something that he has really wanted to do, and something that hasn't necessarily been encouraged by the family, but is something that he has wanted to do and the family have got right behind it.
“Every step of the way he has proven himself worthy and won races and really done what's required on-track.
“I'm very proud of him and I'm very proud of Steve too just in the way that Steve has helped with his development and got him to where he is. It's just a special family story.”
Johnson's next competitive outing is slated for June 10-12 at Winton Motor Raceway for the TA2 Muscle Car Series.