Two of the radical Nissan GT-R LM NISMO LMP1 cars will feature wide-reaching aerodynamic changes for the rest of the 2015 WEC campaign.
The new kit was signed off by Technical Director, Ben Bowlby, last month and is currently in production.
"We've probably made a rod for our own back by saying this car is a Le Mans special in some ways," Nissan boss Darren Cox told Motorsport.com at Le Mans today.
"We are comfortable with the numbers it has been pulling and showing us.
"One of the big challenges will be managing brake temperatures but we have plenty of downforce to play with so we will be OK."
Motorsport.com has learned that Nissan has scheduled five days testing with the new-look body-kit in to its post-Le Mans testing plan when it returns to the US.
The team will use its Silverstone base as a staging post before treating the Nurburgring round as a "semi-flyaway."
"We need to give Michelin more (data)," Cox added.
Driver line-ups undecided post Le Mans
While the focus for Nissan has been Le Mans, Cox was keen to acknowledge the rest of the WEC season and how the Japanese manufacturer will tackle the five remaining six-hour races.
"We are all racers and we are going to turn up at those events wanting to race," stated Cox. "We also need to learn more about the tyres as this is the data we will be craving for 2016.
"The more running we can do pushing the boundaries at the shorter circuits the better tires we will get for next season."
Cox acknowledged that the final driver line-ups for the races are yet to be completely determined.
"There are a number of things that have not been decided yet post-Le Mans," said Cox. "We've got ten great drivers and we'll learn a lot about how they gel here this week.
"The atmosphere we have created within the team is a good one and honestly people like Harry (Tincknell) I am conscious that we need to keep hold of these guys, because they are that good."