The World No 2 finished six shots adrift of winner Sergio Garcia in seventh place after an unusually errant driving display.
“I need to change my golf ball. That’s a big thing," said McIlroy.
"I thought my golf ball this week was doing weird things in the wind. It was very inconsistent so there’s one thing I will change and try to work on the next few weeks.
Rory McIlroy's best result at the Masters remains his fourth-place finish in 2015
I’m going to tinker with some equipment over the next couple of weeks and find something better
“I feel I’m swinging it as well as I have been for a long time and my putting feels as good as it has done in a long time but I maybe didn’t drive it was well as I could have done in the first couple of days here.
"I feel like I’m a good driver of the golf ball. I’m going to tinker with some equipment over the next couple of weeks and find something better.”
McIlroy, who is getting married in a fortnight, will return to action at the Players’ Championship at Sawgrass before resetting his dial for the season’s remaining Majors.
“I’ve turned my focus to getting ready for the US open in June and trying to add to my Major tally there," he said.
"Erin Hills is an unknown for everyone but Birkdale is one of the best Open courses on the roster and we are going to Quail Hollow for the US PGA where I’ve had success in the past so there are nothing but positives ahead.
“My game feels in good shape. It’s just a matter of working hard and putting myself in position to win.”
Get Quotes on Home Insurance