should i up grade my brake lines when i put my supar brakes on not sure will the stock ones be ok

I'm pretty sure you don't need to upgrade your brake lines when you upgrade to Supra BBK..

Can someone confirm this??
Sorry, not too familar with GS brake components, but for the SC it bolts right on...

that's correct, when you upgrade to supra bbk, it's not necessary to put on the ss line. not a requirement, since the srock supra tt brakes they have rubber lines too

but my quesion is, why not? its only 100 bucks, and you need to bleed your brakes anyway