My gawd is this frustrating. Okay so I went through all of the engine folder, turbo0 and turbo3 in search of sounds I could recognize. Here are my findings: THEY ALL SOUND THE SAME (or very nearly) the reason being that it seems PD decided to slow down the sound sample a lot and speed them up in the game's programming or something. I managed to find the Mazda 787B's sound, but it's nearly unrecognizable. I had to speed the sample up by 2.5X to get it to sound as it would at 8k rpm. If every single sound on GT6 is that way finding anything will be a massive hassle. Anyhow, I found 2 leftovers that may or may not be used: 22401 TVR Speed 12 (which is basically exactly like it was on GT2-3, down to sample pitch) 23001 which uses what used to be the Toyota GT-One samples, as for if they're used or not on GT6... I can't tell. I know the GT-One and every car that had a similar sound to it (BMW V12 LMR, Jaguar XJ220/XJR9 and a few) have had their sound altered since GT5. So yeah. Identifying the cars associated with sound will be a pain. Apart from that, I'd say we have a fairly good chance to be able to port some over to older games, with a few tweaks here and there. Me and Xenn will eventually look into this. But do't expect anything soon-ish. It's going to be complicated.