I use metalshredder7 unreleased beta of his 787B mod (on the F1 LM slot, but you can use the sound on any Mclaren)
I suggest you set the gears to 5 with TDUMT for more realism. Thanks to $p4c3 for the idea.
Source :
TDU sound :
Download :
Mazda 787B TDU sound (Mclaren slot) by Doctor G.zip