Still pulls to the sides after alignment... What can it be?

[mfelix15GT]

I recently bought new tires and lowered the car wit BMR springs and then got an alignment done. Everything else in the suspension is stock. The car seems to be pulling to the sides, a little more to the left than the right. The front is aligned pretty good within range and the rear is a little more off, especially my rear left tire. The rear alignment is whitin the range but barely, I would obviously like to have it more within range. I can tell visually that my left rear tire sticks out more than the right (which bugs me) and the shop owner told me that that was all he can adjust. That if I want to fix it then perhaps I can buy a kit to adjust the rear toes.
What do you guys think? Is that what most likely is causing my car to pull to the sides?
Any advise would help. I'm trying to decide so that I can maybe buy something before the deals go away. thanks.

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[Rebellion]

I would call Kelly at BMR to ask...and then report back what's going on. Pretty serious stuff to diagnose on the Internet.

First, I would look at the toe rod eccentric bolt and record their position, with a photo if possible, it will help the diagnosis. Has the installer and/or alignment guy retorqued the control arm fasteners with the car loaded on all 4's?

Sometimes it happens that one side sags more than the other just after lowering. Mine did pull right slightly after lowering and before alignment, after a while, it was OK (even before alignment). For safety, I took a whole 2 weeks of breaking in after installing the springs and dampers.