McLaren is planning a "substantial" update to its Formula 1 car for the season-opening Australian Grand Prix, with its launch-spec set to be unveiled on Friday.
The team's Renault-powered MCL33 will be revealed later this week, and McLaren has hinted at a bold new livery it believes will appeal to fans.
But while there are big changes taking place at the team, its aero chief Peter Prodromou says the initial design that will be revealed and will test next week will not be radically different from last year.
However, a big effort is being made to introduce new parts for the first race in Melbourne.
"We have tried to develop the car as we have done for the last three years," explained Prodromou. "We've tried to develop it in an evolutionary fashion.
"You can expect to see something quite similar conceptually for launch, and then in truth we have spent the last two to three months focusing on a race one upgrade.
"That is where the major focus has been and still is - to try to deliver a decent upgrade both aerodynamically and mechanically and to put our best foot forward for Melbourne.
"We very much hope and expect that the car will feel from the off quite similar to how it felt at the end of last year and perform quite similarly.
"Hopefully we've taken a step forwards and then we will try to do something a bit more substantial for Melbourne."
500km testing target
McLaren will be heading to pre-season testing hoping for much improved fortunes compared to 12 months ago, when it endured a nightmare start to the year with Honda.
The team says that a plan is in place for it to complete 2000km per test with its Renault-powered car.
McLaren's engineering director Matt Morris said: "500km per day is a plan. That is on the run plan."
Asked about where he felt the team was compared to last year, he said: "It is always nice to be a little bit further ahead, wherever you are.
"In terms of all the sign-off of the car, and running it [the gearbox] on the back of a Renault engine, we should be going into winter testing in as good a state as we can be.
"Even if we had changed engine earlier, we would not have done other things earlier."