Nissan Skyline GTR (R34) Engine Sounds Pack
Installation:
Open one of two folders with sound you like, then drag and drop VEHICLES folder inside it to your game directory, make sure that you made a backup of original VEH_2076524_HI.BNDL file
Sound Demonstrations:
2F2F: https://youtu.be/73fG3-3W7AE?si=M-3u58wSLvkEcvUU
Straight Piped: https://youtu.be/XqswUErjiek?si=UMrdm26NAadqvurs
Credits:
7ndrew: for tutorial on how to extract .gin files from MW12 as well as Raimo i just reversed process