Many drivers opt to increase their car’s power through aftermarket parts and accessories. But few get an offer from the dealer to come back and get their car upgraded for free.

That’s exactly what Ford is offering owners who bought the Ford Super Duty pickup truck this year. The current engine in the Super Duty is a 6.7-liter Powerstroke V-8 turbocharged diesel, but its numbers were just below the best in its class.

However, Ford engineers have figured out a way to upgrade the engine in order to give it class-leading numbers. Now, Ford is thanking customers that bought the vehicle by offering that upgrade free of charge, according to USA Today.

By dropping the car off at the dealer, drivers will get 65 more foot-pounds of torque and 10 extra horsepower, pushing the car up over 400. The upgrade offers will start this month and continue into the next year.

The upgrade also affects any unsold Ford Super Duty cars for sale that dealers have on the lots, as well as trucks currently in production.

Drivers who buy a late-model used Ford Super Duty without the upgrade can know that they’ll have a bit more power once they take it by a dealer.