First we tried to get the collectors off at my friends house but couldnt get them loose. So we go to a performance shop down the street from his house and get one collector unbolted, but ended up stripping 2 of the 3 bolts on the other one. Since I was already there and getting irritated, I told them to go ahead and install them. We got there at 12:30, didnt end up getting the truck in till around 5. They were working on a Z28 that was giving them fits, and how funny it was with some headers. So while its up on the lift they tell me it doesnt look like the cats will fit, so I tell them to weld it up without the cats. They unbolt the stock manifolds no problem. They get the drivers side long tube in nice and perfect. The passenger side was horrible. Wouldnt fit for **** at all. We had to dent in the header a little bit, hit down a heat shield that was in the way and eventually ended up having to move the starter as well and also had to lift the body off the frame to get more clearance. So finally at 10pm, yes thats 5 hours of working on it, they finally get it all bolted up and welded on. I still have a little collector leak, but not bad so I'll just take it to an exhuast shop and get it done again.
I'm so exhausted, I was at that shop from 12:30 to 10:30 in the sun all day.
So now I'm running ASM's with no cats and true dual dynomax bullets.
All I can say is it sounds like Im running open headers. The sound is incredible and very f*cking loud. Sounds nice and quiet at idle and when cruising around, but once I get on it, it roars. Feels like it lost a little down low, but the sucker flies from 2nd gear up. I think I'll end up putting cats back on it when some more paychecks come my way and I can get a real exhaust shop to weld it up.

 

Damm that sucks... Glad it worked for you in the end.

 

Damn man! At least it's done and your 6.0 can breathe.

Any sound clips of them ho's installed?

 

U dont need cats Biatch and all i gotta say if there is some secret to get those headers on a Denali with less Hassle i would love to know it because I sure as hell dont see it happening and just take it back to Owen and he will redo the weld for u man. Either way sorry I could not help you out more yesterday sure as hell wasnt looking good with them damn headers. But they are on and she can breathe now.

 

headers, theyre a bitch

at least theyre on there now

 

Ya i agree with the passenger side install.I didnt have to dent them or bend anything,but i did have to drop tranny crossmember.I also took out pasenger side fender liner,and removed tire ,and installed it from the fender well, down to the cat.When i did this after 4hrs of i got it in in and bolted up in 30 min.So this might be a tip to anyone who plans on a set.Best $800 bucks spent yet.

 

My trick was to slide the passenger header in from the wheel well, it took me like 4 hours for the whole job, and that including welding everything back up.

 

you gotta realize with it being AWD there's extra **** everywhere also

 

true but i think that pass side gives everyone hell. i am running the same exhaust and i dont know how you say it is not loud around town. but i do only have a single cab. i also thought about fabbing an H-pipe up and seeing how it changes the sound.

does yours have a little rasp at part throttle?

Edit: seen your other post... you have a tail pipe and mine is dumped. i have never been a fan of rasp so i dont know if i like the way it sounds yet but it is staying like that for a while.

anybody know what an h will do for sound?

 

When I did the hamms headers on my truck they just fell into place,Did a set of the larger tubes AZ speeds on a Denali,What a S.O.B(Pass.side),All I needed to know was whether to go in from the top or the bottom,no way thru the fender well like my hamms. Finally went thru the top,removed the coil pack+intake ECT.There was a suspension bar we removed, after all done and said I dont know if it was nessesary.Didnt have to dent the headers.My only complaint was they didnt say go in thru the top or bottom on the Pass. side.