ok so im looking to get lowering springs for my 2007 tc but i don't know what to get i want a good drop with handling results. and something that will be good for like an autocross track i had a two in mind the ksport gt lowering springs or the tein s techs. suggestions???

 

Tein H.Techs I hear are great for Auto X, they are a 1.9" Drop in the front and a 1.5" drop in the rear. TRDs are another option as well, 1.25" drop all around. Depending on your drop, you may also need camber bolts for the front, they are pretty cheap ($30).

Search around on the forums too.

 

I do not autox but it has been discussed here many times that anything significantly more than the TRD drop will lessen the handling experience. If you are still looking for s techs, HyPnOtIk i believe is still trying to sell his.

 

Never autox'd my car, but Eibach Sportline springs handle amazingly on the road and nearly eliminates all body roll. 2 inch drop all around.

 

FAQ
https://www.scionlife.com/forums/scion-tc-1g-suspension-handling-1615/suspension-faq-read-first-47974/

Buyer Guide
https://www.scionlife.com/forums/scion-tc-1g-suspension-handling-1615/buyers-guide-scion-tc-suspension-37735/

Both stickied right above the New Thread button.
Do some searching, this topic has been covered hundreds if not thousands of times.