NASCAR has mandated a different intake manifold for Toyota Busch and Craftsman Truck Series teams, in an effort to "level the playing field" with other manufacturers. The change will not affect the Nextel Cup Series.
In a technical bulletin issued this week, Busch Series Director Joe Balash said NASCAR will require Toyota teams to replace their current intake manifolds with newer models, in an effort to reduce horsepower. The sanctioning body has tested a number of vehicles on its chassis dyno in recent weeks, and sources tell Sirius Speedway that those tests revealed an advantage of approximately 10-15 horsepower for Toyota teams.
Toyota Tundras have swept all four Truck Series races this season, and claimed the next three spots behind winner Carl Edwards’ winning Busch Series Ford Saturday at Nashville Superspeedway.