Hey guys, new Corolla owner and new to forum. I'm on a budget but wanting to make my corolla my own, so I'm thinking I'll start off with lowering my car. I'm curious if anyone is aware how strict dealerships are with springs and voiding warranty. I asked the guy while I was getting my car serviced at Toyota and he said that TDR springs are ok, as long as I get them installed by the dealership, but that drives the price through the roof. Should I really consider this before installing myself, or is he blowing smoke?