Anyone know where to take my titan to get my jba shorty headers installed, i have an 04 offroad and want to eliminate the cats and change the y pipe and do a single bullet dump or dual dump. i am worried about throwing codes and want a shop that has done this before with titans. My manifolds are cracked and sound like sh*t. i feel like i could put the headers on myself i have an exta vehicle if i cant do it all in one day. but would need an exhaust shop to weld up the pipes. does this sound doable?