Holy moly. 
I'm now using these sounds for the LX4 - not because I think it doesn't fit the LX6 - I'm just driving the LX4 lately and its weeeEEEEE
EEEEEEE sound is really starting to get on my nerves. So, I installed this CSR thingy and your sounds (using the old .dat file, though) and started driving a few laps. 
I don't know why, but I almost instantly dropped my PB by about one second, probably even more if I hadn't messed up that last lap now. The back end seems to step out much more seldomly, I get the corners much better and the overall confidence is much higher. 
My guesses are:
- Much more immersion letting me drift off into "the zone" much faster
 - Much better feel for non full-throttle situations (corners), because it now sounds powerful even with half throttle
 - Quieter tyre squeal, so I'm not so passive anymore (though, tyre temperatures were lower, because the rear wasn't stepping out all the time, due to point #2)
 
Having these sounds really makes me want improvements to the stock sound engine, but this will be doing it for a while now. Anyways, excellent work. 
