Hesitation under 3K RPM's

P's_Z

Hi all, i have a 2013 SP Z with 6K miles, and it seems that SOMETIMES when i step on the gas under 3K rpm, the car sort of hits a wall and does not seem to accelerate too quickly. After 3k rpms, the car feels great and accelerates with no issue whatsoever. This mostly happens while on 3rd gear. i havent really changed my style of driving, meaning that this is something i was not experiencing before. Ive seen a few threads on this issue but no one seems to find a definite solution. Ive filled up in different gas stations with shell 91 oct (this is the best we have in PR unfortunately), cleaned maf sensors with maf cleaner, reset ecu disconnecting the battery but the problem is still there. Only mod is z1 maf hoses and K&N drop ins which were installed 1k~ miles ago and car felt great after install. If anyone can chime in on this, i would appreciate it. Either way, i will take it to the stealership if i cant solve the issue, but was interested in solving it myself if it was possible. Thanks guys!

O.ooops. Just noticed i sorted of posted in an incorrect area. Sorry mods, if its necessary please move to correct area. Thanks