Wondering if itd be safe to drop on some TRDs on a 100k+ tC. I know with the s-techs or even the h-techs, anything lower then a 1.25" drop can lead to premature strut blowout. Suggestions?

 

at that point, might as well buy new shocks with it.

 

Your struts should be replaced by 100K miles anyways, adding a spring won't make much of a difference on wear when their likely already pretty worn. ANY aftermarket lowering strut will vastly affect wear on struts.

 

I added springs at 95K...I'm now at 140K.

If I had a chance to do it again, I would have replaced the struts along with the springs. I've had no major issues, but the ride is getting rougher as the miles get higher.

 

x2. You can mod a car at any point in its life, just gotta know what's gotta be replaced along with a mod.

 

Replace shocks and then buy springs to accommodate them.