Please post up some pics of your lowered TL. I am thinking of using Eibach springs. Only concern is the over-hang of wheel well. Are you using spacers to correct this?
Thanks

 

this member lowered his TL in this this thread https://acurazine.com/forums/4g-tl-photograph-gallery-296/2010-tl-awd-773979/

 

Check the Tires, Wheels and Suspension folder, you will find a few in there.

Here is mine.
https://acurazine.com/forums/4g-tl-tires-wheels-suspension-298/wheel-suspension-upgrade-18s-20s-h-r-springs-%2Apics%2A-771791/

Tires are RJ Legend Type II 20" 8.5 width +40 offset.

Edit: I just noticed you have a SH-AWD. For that the Eibach springs I don't think are compatible. H&R are the ones that work with the AWD version.

 

Thanks guys.
I'll look into H&R.

Pete... I love the aggressive look and perfect flush.