Got my Fluidyne today from Titan and this radiator looks beautiful. Its all aluminum and its about 2" shorter in width but no problem. However, the LS400 radiator has an intergrated oil cooler at the bottom of the oem radiator. This one doesnt have that. Therefore, an transmission cooler will be required. I have two oil coolers at home but one is too big and other is too small.
Basically it will fit perfectly. Did all the measurements already and slight right in will slight mod on the brackets no big deal. I also like this radiator because it has a water temperature sensor npt for the temperature sensor.
Here are some pictures. Expensive but worth the money.... Not recommended for N/A applications.
The Supra TT Fluidyne is measured 29" x 19" x 2". The stock LS400 is measured 31" x 19" x 1". However, the stock also uses about 2" of the 19" for oil cooling. Therefore, the true radiator dimension is 31" x 17" x 1".