I'm at about 25.75" to the top of the fenders, using HKS coilovers
I've got a great alignment
I'm thinking of lowering my car to 25" - with no other adjustments (just the coilovers) would that change the toe in front and/or rear?

 

I'm not knowledgeable on the subject, but my guess is if you do any change to suspension it's going to throw something off such as camber or toe. I would probably recommend an alignment, also don't forget to let it settle at that height. I know when I put mine at 25" all around i drove around a bit and it lowered, so I had to make some final adjustments before the alignment.

 

you will need another alignment unfortunately.

 

I figured so, but it never hurts to ask
Thanks

 

contrary to popular belief that "you always need an alignment after changing ride height" the correct answer is it depends.... but probably not.

it depends on the cars bump steer. (google it).

the back of my FC currently has damn near 0 bump steer, so I can change height around ***** nilly and it won't affect toe at all.

The front has a bit more, but still not much (my front geometry is no longer stock though, so if anyone else is reading this, your results may very). but I can still lower it an inch and have negligible toe change (0.001" per side last time I measured).

all this doesn't help you because I don't know what the bump steer on an FD is, but lowering the car 3/4" shouldn't affect your toe that much. If it does, you have bigger issues because they same thing will happen if you're going around a corner or you hit a bump and your suspension compresses 3/4"