i was wondering for all of you that have upgraded your front calipers, did you have to change the proportioning valve or master cylinder, or did you just leave all that alone? Just wondering if there will be any after affects since the ls400 calipers are now 4 pistons instead of the stock 2 pistons on the gs400.

Thanks for the help.

 

I believe they're direct bolt-on, however you'll be needing a special item called an RCA for clearing suspension parts. Do a search on it, im sure you'll know what im talking about.

 

Yep, nuf said.