Both. There's a lot of stuff running along the firewall that don't really react well to heat. From looking at the pics, I'd guess the four hard lines are brake lines going ot the ABS module, there's the A/C line, heater hose, and I know there's some electical wiring back there.
If you look at the stock setup, the exhaust manifold and downpipe are both completely covered by heat shields. There's good reason for that.
well my girlfriend already bought the kit and it is being put on the car...will be any problems with that kit or will it be ok?
wow generous girlfriend!
"On a given day, a given circumstance, you think you have a limit. And you then go for this limit and you touch this limit, and you think, 'Okay, this is the limit.' As soon as you touch this limit, something happens and you suddenly can go a little bit further. With your mind power, your determination, your instinct, and the experience as well, you can fly very high." - A. Senna