Former Formula One world champion Kimi Raikkonen tested so well in the No. 18 Kyle Busch Motorsports Toyota Tundra this past week that talk now is that he could make the jump to NASCAR Sprint Cup racing far sooner that originally planned.

Raikkonen was matching times with NASCAR super star Busch on the second day of testing at Darlington Speedway in South Carolina in preparation for his truck-racing debut May 20 at Charlotte Motor Speedway.

The plan was to have Raikkonen run a couple of Truck races and maybe a Nationwide race this season.

But on Saturday at Texas Motor Speedway -- where Sprint Cup teams raced Saturday night -- Joe Gibbs Racing boss J.D. Gibbs said Raikkonen could be rushed into Cup this season.

Although Gibbs told SceneDaily.com it probably wouldn't be in a fourth Gibbs Toyota.

But Gibbs did not rule out providing JGR equipment to a Cup team put together by Busch's outfit.

"I think it's great having him come in the sport and kind of looking at it and feeling it out," Gibbs said of Raikkonen. "Kyle is the right program to do it with. It's a good fit.

"We can always help Kyle out with some cars down the future."