Mn Avalanche

Hi evryone.Been browsing here for some time..I got the 93 nelson tune.Thx Allen.I also bought AZSM long tubes,from Project r.Well Heres my question.I took my avalanche in, to have them installed by i highley recomended guy at midas. And he calls me back and was wondering if they sent new y pipe etc,to weld up to factory exhaust. SO now im wondering wtf,it cant be that hard to do.He says hes done the comlete dynomax set before headers,and cats are included in that setup direct bolton..So here i am asking for your help how to get this completed?What does he need to do to once headers,are installed to mount to exhaust?

04sierra

All he needs to do is cut a few inches out from in between the flange and the cats, enough to make it fit, and then weld it back up. It shouldn't be a problem.

ranwalk

iTrader: (1)

He has to cut the exhaust in front of the cats to weld on the collectors. Should be pretty straight forward for an exhaust shop to do. Any work instructions come with the headers? They should have.

oxidizr

iTrader: (4)

It is a common misconception but the Avalance Y-pipe is in fact dissimilar enough to require some fabrication ... but not impossible.

WhiteDiamond

Doesn't Midas advertise they do exhaust work??? They can't figure it out??? Gotta flatbed to get that truck to a new shop???

Todd

Mn Avalanche

Well thanks for replys.I allrdy have a magnaflow catback. the headers were the missing link.Ya i got pist and pulled my truck,From his shop. Ill either do it myself or find someone,who aint intimadated by the lt azsm headers.I just dont have the time to do it myself.To me time is money and i have more money than time. Im just trying to have it rdy for radix by end of the month.

Flyer

iTrader: (1)

Unplug the front o2 sensors while your driving around with the headers open. Otherwise fresh air will hit them and cause your truck to run entirely to rich.

Any competant exhaust shop should be able to get them welded up.

Mn Avalanche

Okay all yu togs and azsm guys.did yu leave your stock cats on, or go high performace cats?Does it hurt performance, to leave stock cats on there?my headers are being installed as we speak, and he asked me why leave stock cats if yu going through all this trouble to let it breath?I was like dunno ill ask and get back to ya?so thats my question thx.I allrdy have a magnflow cat back,and pro cold air induction,and a radix as soon as i blow this tranny, truck only has 3800miles on it.but i had allen remove 80%tm so im sure it wont be long,cause i drive it like i stole it.

04sierra

From what I understand, the stock cats flow about as well as the high-flow after market cats. I don't think they will be that much of a restriction.

cstchevy

jsut take the damn cats off if it's that big of a probelm, then they would just fab a ypipe at any decent muffler shop. since you have the nelson tune have him send you one for the 02 delete.