Renault has confirmed that it will supply Scuderia Toro Rosso with engines from the start of next season.
Toro Rosso has used Ferrari engines since 2007 but will switch to Renault for Formula 1's new engine era in 2014.
As expected, Renault will continue to power reigning world champions Red Bull.
"We are very pleased to have reached an agreement to use Renault power units from the 2014 season onwards, when the new regulations will present interesting challenges," said STR team principal Franz Tost.
"It is particularly important that we have managed to finalise our plans early, so that we can be as well prepared as possible for next year. While looking forward to working with Renault, I would also like to thank Ferrari, our engine supplier since 2007. They have provided us with an extremely effective and reliable engine and an excellent service."
"Strategically for Red Bull and Renault, it makes perfect sense for Scuderia Toro Rosso to use the same power unit as Infiniti Red Bull Racing from the 2014 season," added Red Bull's Christian Horner.