[BRZPDX]

Sportline springs are 90% for looks only on a budget. It rides and performs like shit imo. The stock struts were not designed for the shortened springs, and harder spring rates so it throws off the balance for grip cornering. The stock dampers/springs are pretty damn good, according to some very credible track drivers.

The buttdyno will suggest that it rides stiff, thus it must be cornering better. It will lower your CoG, so maybe better for drifting.

I have the Sportlines just to get rid of the fender gap, but any spring or sub $1k coil over setup will be a downgrade from the stock suspension system, pure performance wise.

You will get camber in the rear once its lowered, I have -2.1L -2.2R. There is a possibility that you might get "wacky" camber, where it does not even out in the rear, in that case you will need to get LCA's to fix the issue.

There will be camber wear with -2 in the rear.

The biggest improvement I felt handling wise, was adding camber in the front with camber bolts (-1.4). Sway bars will make a difference over tower bars (upper strut bars), and I always believed to stiffen up the suspension from ground up, not the other way around. Put some thoughts into sway bars, if you want over steer or under steer correction. This will change with spring rates/damper settings with your suspension so it should be one of the last things to touch.

Don't forget sway end links, the OEM ones will not hold after you stiffen up the sways.

Suspension work is very very difficult, more so than adding power. This is why I'm falling behind on this part of modding, add the power to satisfaction first, then upgrade suspension.