Sauber plans to introduce a major update to its car for the Spanish Grand Prix, which it hopes will help it continue its fight for regular points-scoring finishes.
The new developments will include further experimentation of the 2011-style blown diffuser, which a number of outfits are trying to get on to their cars as soon as possible.
Technical director James Key said: "We'll have a new, quite significant aero package on the car, which will be a completely new front wing, updates to the front and rear brake ducts, new bodywork, new devices around the floor leading edge and under the chassis, and we'll be testing the new exhaust system again.
"We'll also be continuing our work on the mechanical update we had in Istanbul, which proved to be positive. So it will be interesting to see how this works. If it works well it should give us a good few tenths of a second improvement in lap time. Our goal is to continue our good race form, to try to improve qualifying and finish as high in the points as possible."
Sergio Perez hopes that the new updates would be useful to help boost its qualifying form in particular.
"In Turkey, we weren't able to show our potential and I hope this changes in Spain and, to begin with, we are better in qualifying," explained the Mexican. "We will bring an update for the car and I trust it will meet our expectations."