We are talking about hardware mods not "software" mods. Lol

Kept the struts/shocks from the brz. There isn't enough of a difference (if there even is one) to warrant changing those.

Ride is the same. FRS folks might notice the stiffer BRZ front springs effect on the ride however.

This, it understeers like an a@@hole

Haha software mod is free though.

Easiest mod is to fit decent tires. Michelin Supersports won't oversteer.

Just came back from a long canyon run after installing FRS rear springs on my BRZ. Nuanced differences:

*It still understeers, but it isn't the party-ending plow that required a big stab of the brakes to correct as before.
*Getting on the throttle hard out of turns results in noticeably less squat.
*Oversteer can be requested rather than provoked.
*The ride is a tad stiffer.

I would say that this is the OEM/budget setup of choice.

Some have complained of a too-stiff ride. I am curious to see how an FRS front BRZ rear setup would feel.

Agreed :D

I have an 86 and I'm happy with the suspension. Even with extra power the car is very predictable. Seat time helps a lot, get to know the car some more. Know your track or preferred winding road.
Better tires should provide the best bang for buck returns. Handling, traction and braking.