Having purchased new car for wife, I now have access to her old 1993 Civic Si. With the exception of my occasional time at the wheel, this car has 150,000 easy miles, faithfully maintained, engines still strong, clutch and CV joints have been the only repair/replacement items.
Running on stock wheels and 195/60/14 Pirelli HP tires (ready for replacement).

Observations...body seems to flex when pushed hard at high speeds (Interstate + 10mph). I value the space in the back and wouldn't want to intall a rear tower cross brace (although that might be the best bang for the buck).

Question? Are there pretty much universally accepted suspension mods for this model and vintage, that limit roll, add to body stiffness, but don't involve "pogo-ing" ride characteristics?

 

you just need to get a good set of springs for your car, i got the tien s tech and it feels like your stock ride but corners amazing, no roll