TLAD:

1. In OpenIV, go to TLAD/pc/audio/sfx/EP1_SFX.rpf/EP1_SFX
2. Enter in Edit Mode, and drop the RESIDENT_WEAPON file

TBOGT:

1. In OpenIV, go to TBOGT/pc/audio/sfx/EP2_SFX.rpf/EP2_SFX
2. Enter In Edit Mode, and drop the EP2_RESIDENT file

Optionals:
In Optionals, you have an edited SOUNDS.DAT15, which edits the tail sounds to be better heard in-game, you can drop this in audio/config, and replace the file. It's reccomended to use this to fully experience this mod
If you have a mod that edit this, such as The Actual Complete Edition or Revamped Combat or if you want to do it manually, i got a topic in GTAFORUMS:
https://gtaforums.com/topic/995647-ivtut-louder-tail-sounds-via-rageat/

Credits:

The IV Modding Server, for always supporting me.