1997 GSX - DD, RR, and 11's.

[asshanson]

In the feed line between filter and rail is where I'd put it.
Or if you have an aftermarket FPR, put it on the top in place of the mechanical gauge that usually goes there. I'm assuming the sensor is 1/4" NPT and will go right on the FPR. Much easier than splicing in a 1/4" NPT bung.

Edit: I meant 1/8" NPT.