Force India achieved its highest-ever constructors' championship position of fifth place in the Brazilian Grand Prix.
The Silverstone-based team needed only three points to seal its maiden top-five finish in the teams' standings and managed to do so thanks to Nico Hulkenberg's sixth place.
A consistent run in the points since the introduction of the B-spec car during the British Grand Prix meant they scored a solid 89 points to just 31 in the eight races prior to Silverstone.
"Everybody in the team is delighted that we have secured fifth place in the championship with a race to spare," deputy team principal Robert Fernley said.
"It’s the reward for all the hard work put in by everyone back at the factory in Silverstone, at the wind tunnel, and here at the track. We have been through a lot this year, but we never let our target out of our sight."
Hulkenberg echoed Fernley's delight over securing fifth place. "It’s the best result in our history and shows the progress we have made over the years," he said.
"This fifth place is a result of all the hard work from everybody in the team and we should feel very proud of what we have achieved together."
Hulkenberg shines, Perez struggled
Starting fifth, Hulkenberg lost out to Valtteri Bottas and Daniil Kvyat in the first corner but managed to undercut Kvyat during his first stop and keep the Red Bull at bay for the rest of the race.
"I’m very happy with sixth place, it was fun, although I didn’t have the best start and got some wheel spin, which dropped me behind Bottas and Kvyat," said Hulkenberg.
"Fortunately, I was able to get one of those places back with an aggressive early pit stop, but that forced me to do two very long stints on the medium tyres, which was the main challenge of the day."
Meanwhile, teammate Sergio Perez had a disappointing race finishing 12th as he rued the decision of opting for a set-up different to Hulkenberg, which messed up his weekend.
"I tried everything, it was a very complicated race with a bad pace. No doubt there was something wrong with the car," said Perez after the race.
"I feel I didn't go in the right direction with the set-up on Saturday, it was different to Nico's. We made a mistake there, but still the difference was too big in the race.
"It was a very frustrating race, the worst of the season."
With one race to go, the team has now 120 points in their tally with Perez ninth in the drivers' standings at 68 points and Hulkenberg moving up into the top 10 at 52 points.