Doing my ARH install on Friday, can you guys give me your time length and suggestions for an easy process?

Ie truck on ramps or on the ground? Pull the fender wheels or not? Any flex joints for sockets?

Thank you for your help! I have installed a very difficult set of headers on my 05 GTO but I had access to a lift when I did em'....

 

Definatly put the truck on ramps and pull the fender wells. I installed both of mine through the bottom. Take out the spark plugs too. Take your time and it should all work well

 

Mine went in from the bottom on a lift. Didn't have to remove spark plugs, front driveshaft, or anything like the instructions said.

 

My both sides of my Kooks went in from the top. I had to remove the intake tube to get the passenger side in. I like to thread 1 bolt in close to the firewall and set the header on top just to hold the back of the header. Then I thread the bolt at the front of the engine to hold the header on. Makes it easy. I didn't take my spark plugs out.

 

put it up on ramps. It will give you more clearance.
Did mine Both from the bottom. I cracked one spark plug

 

I put my truck up on ramps and literally sat in my engine bay in order to unbolt my stock headers. You wont be able to pull them out through the top, you gotta drop them down under the truck. Same thing with putting the new headers on, gotta be fed up from the bottom. After that, climb back into the engine bay and start bolting them on! The bolt closest to the firewall is a bitch to get to, I recommed using a ratcheting box end wrench. PM me if you have any more questions, I just did mine last week.