NO
Pacesetter makes some of the worst header i've ever seen. dont put it on just sell it. they're notorious for having leaks.

but to install a header, u gotta make sure that ur engine is cool.
take off the heat shield.
unbolt the header adn the downpipe
and when putting the new one on, put on teh header first and put on all nuts by hand first.

then start tightening them w/ the smallest wrench u've got. starting from the center out. do the ones in the center first then one on the right, one on the left, one on the right, and so on.

also DO NOT put any kind of pressure. those are very easy to over torque and it'll fuck up ur threads in the head and its not fun tapping that shit.