There's not enough space on TekkenMods for all of these, so I'm uploading them to Google Drive. Also, make sure to install these in C:\Program Files (x86)\Steam\steamapps\common\TEKKEN 8\Polaris\Content\Paks\~mods or another subfolder directly under Paks that begins with a ~. Otherwise some of them may not load, particularly the ones that replace Tekken 8 tracks.
Also note that I will periodically update and add to the songs in this list, so make sure to check the Google Drive and sort by Last Modified to see what's been added because I forgot to write them here lmao my bad
Songs and what they replace: - XCDE You Will Know Our Names -> Hwoarang Stage (Arcade ver.) / TEKKEN TAG - XCDE Mechanical Rhythm -> Ball Wall / TEKKEN 7 - XCDE Unfinished Business -> Marshall Law (Japanese Traditional Techno Mix) / TEKKEN 2 - XCX Melancholia -> Your Sunset / TEKKEN TAG 2 - XCX Black Tar (on foot) -> Gallery Parallax / TEKKEN TAG 2 - XCX Black tar (in skell) -> The Big One ~Quiet Strings Mix / TEKKEN TAG 2 - XCX Wir fliegen -> Jin Kazama (Console ver.) / TEKKEN 3 - XCX Uncontrollable -> Time Will Reveal / TEKKEN 8 - XCX NLA Daytime -> Landscape Under The Ghost-Kaminano (AD2012) / TEKKEN TAG 2 - XCX NLA Nighttime -> Emotionless Passion / TEKKEN 2 - XCX Noctilum Daytime -> F.F.Y.R. / TEKKEN TAG 2 - XCX Don't worry -> Yoshimitsu (Console ver.) / TEKKEN 3 - XCX Ganglion Menace (Battle in Skell) -> Only one Fight / TEKKEN 6 - XCX NO.EX01 (Normal) -> Call of the Inferno / TEKKEN 5 - XCX NO.EX01 (Climax) -> Glow of the oil / TEKKEN TAG 2 - XCX In the forest (Normal) -> Gunjack (Console ver.) / TEKKEN 3 - XCX In the forest (Climax) -> Arctic snowfall 2nd / TEKKEN 7 - XCX The key we've lost -> Offshore oil / TEKKEN REVOLUTION - XC2 Battle!! -> Solitude Remix / TEKKEN 7 - XC2 Still, Move Forward! -> Battle Cry / TEKKEN TAG 2 - XC2 Incoming! -> Fear / TEKKEN 4 - XC2 Monster Surprised You -> Poolside (Curvaceous Mix) / TEKKEN 7 - XC2 Death Match With Torna -> Our Tekken Ball (Normal) / TEKKEN 8 - XC3 Keves Battle -> Martial Medicine / TEKKEN 5 - XC3 Brilliant Wings -> Delusional Reality (Normal) / TEKKEN 8 - XC3 Kaleidoscopic Core -> Hiten / TEKKEN 5 - XC3 New Battle!!! -> Monument Valley, U.S.A. (Console ver.) / TEKKEN - XC3 Redeem the Future* -> Ogre (Arcade ver.) / TEKKEN 3 - XC3 Redeem the Future - Finale* -> Nina Williams (Console ver.) / TEKKEN 3
*I included a Ver. 2 of these tracks in the Google Drive to cut out long portions of the intro to hopefully work better in battle. The originals remain if you want them.