instructions are ok. but you need to know what your looking at theirs like 2 or 3 black and white pictures that kinda confuse you more then help. not sure if the manifold changed in 05 or what but it looked different in their pictures. i would loosen both drivers side and passenger side up pipes at the manifolds, think they just say passenger, this will help you line up the up pipes to turbo at end. you need to seat the up pipes into the turbo, dont expect the band clap to suck them together, because it wont. i broke one ha. you'll need a few different sized extensions and flexible sockets, and wrenches. some bolts are in tight spots. the bolts on passenger side manifold will be easy to get at. but drivers side is burried. dont un do all the wiring harneses, just try to work around them. oh and biggest thing i found out after i did mine. take the passenger side fender plastic off. it takes like 15 mins and you can get too the lower up pipe bolts and the higher bolts. youll just need about 1 1/2 feet of extension on your socket ha. but way easier then laying on the engine and reaching to the back of the engine. its kinda a pain but worth it. well my truck is running awesome. im doing a mpg run gonna see if i see an improvment