Headers - Ordered - Discuss install and options

[NJ H2]

RE: DYNATECH HEADERS:

OK so AutoAnything told me the Dynatech Headers would bolt to my factory Cats!
They won't!

The shop doing my install called Dynatech and if you want to use Cats the factory Cats must be eliminated.
You must by the whole kit from Dynatech with High Flow Cats!

[pdxrealtor]

Why is that? Any shop should be able to cut out the factory cats, and weld them back in down the line...

[pdxrealtor]

Originally Posted by seventwozero

You'll have better luck if you start soaking the bolts with a good penetrating () lubricant. When I had my mechanic do mine, he gave me a bottle of spray (triflo) and told me to give em a shot every day till the next time I brought it in (about a week). Aside from the two that were already broken, he managed to get the rest out without breaking them. As for the broken ones, he welded a nut onto what was left of the stud and backed them out.

In regards to your powder coating question, I'm not sure if anyone makes a powder coat that will withstand the temps you'll see on an exhaust manifold. Although, I'm not totally sure what kind of temps you'll see on the manifolds... You might be able to find some sort of a high temp paint, IE: I know guys that use grill paint on motor cycle pipes.

Thanks for the info..

I've been spraying mine with screw loose by CRC. I still haven't ordered the bolts as it might be a bit before I can get these installed.

My buddy with the lift is no longer available to me due to his douche bag boss (long story). so I 'll be spending some time in the drive way on jack stands doing the front end, lower ball joints-idler/pitman/cognito support, and hubs.

If I come across some cash before I'm done with the front end I might just have the exhaust installed although I can't stand the thought of someone else touching my rig....

[Joe]

Hey PDX, did you get your OBX system installed? How is it.

This is pretty much the system I am leaning towards. Dyna just a bit to expensive. For same price has just there headers you can get an OBX from headers all the way back to tips.

Also, expecting any problems with emissions with the hi-flow cats?

[pdxrealtor]

Originally Posted by Joe

Hey PDX, did you get your OBX system installed? How is it.

This is pretty much the system I am leaning towards. Dyna just a bit to expensive. For same price has just there headers you can get an OBX from headers all the way back to tips.

Also, expecting any problems with emissions with the hi-flow cats?

No- I just finished up a major service on our 06 Acura plus full detail in and out. It's my wife's car and I neglected it so I got to spend 2 full days on interior and exterior detail work.

This weekend I have my idler/pitman/support kit to install, along with two new hubs, and two new lower ball joints. So... Headers maybe the following weekend.

I better not have any emission issues with the high flow cats. Isn't that the point of the high flow cat? To still pass emissions, but get some better flow??

Geeze if I have to swap cats every two years I'm going to be pissed!

[Joe]

Originally Posted by pdxrealtor

I better not have any emission issues with the high flow cats. Isn't that the point of the high flow cat? To still pass emissions, but get some better flow??

Geeze if I have to swap cats every two years I'm going to be pissed!

lol, i hear you. Just figured I'd see if you heard anything different. Definitely let us know how the install goes and what your thought are. I very likely wont order mind for another week or so since i know with schedule it would just sit in garage anyway

[LoJac963]

I too can't wait to see the install pics! One would assume the high flow cats would perform as they should, low emissions while providing higher flow. However at the same time you may run into the "you get what you pay for" issues.

Hopefully they do work as intended because I would definitely be interested in the same setup. I agree though, I only buy 1 year tags so that would be highly annoying to swap them out.

[[__--MUD--__]]

Originally Posted by pdxrealtor

Why is that? Any shop should be able to cut out the factory cats, and weld them back in down the line...

X2- Cut those bitches out and weld'em in where they need to be. Anyone compitent in exhaust work can do this.

[pdxrealtor]

Picked up my class 90 Zink bolts today from fastenal. $50.00

Torque specs are- first pass to 11lbs, and a second to 18lbs

I will need O2 extenders. But I'm not sure how many... I though I saw 4 sensors. What kind will fit? I can't find any for hummer. Only GM and they all look different. This is a mail order deal so I want to get it right the first time.

What is the O2 socket size, can I just use a wrench? It appears so, but...

H2much ..... You out there? You mentioned jamming these in through the bottom. Is there NO WAY to install them from the top? I'm on wheel ramps or jack stands.

[pdxrealtor]

This job is officially underway.

Driver side header off with no issues, except the one broken bolt head near the fire wall. Nice size stud sticking out of the head to get a grip on.

About to make sure none of the bolts break on the pass. side then I'll get out the grinder and remove the cat froward.

Been taking pics so I'll post when I'm done.

What I can say is easy easy access with wheel and wheel well liner removed.

[Joe]

Awesome. Look forward to seeing more

[H2Much]

Hey, sorry, haven't checked in for a few days. Yah, you will want to feed them through the bottom, but the challenge is getting the truck up high enough in the air. You can also put them in through the top, but you have to pull some stuff out and take it apart to get them in there. If you don't have a way to get it higher in the air, maybe going through the top would be better.

High flow cats should keep you good to go in OR. I too was concerned about it here in UT as they are anal as all hell with everything on emissions and safety. I almost couldn't pass safety instection because of my tires sticking out the side and my lift; though I have a very mild lift in my opinion. Pisses me off as I see trucks much more lifted than mine driving around without any problems getting registered. Anyway, let me know where you are at with this and I can provide you more detailed help if needed.

[pdxrealtor]

Thx for your reply.

Headers are installed and cat forward to headers fit like a glove. I still need to sinch it all up in places between headers and muffler but it's all in place and I simply ran out of daylight and energy.

The O2 s fit with no extension. There are 3 bungs on each side. I need to get a bung plug (that's what she said! Lol) for 2 bungs.

That one bolt that busted off on driver side had a nice stud sticking out of the head. Turns out I had a full blown craftsman stud extractor kit in my box. I was stoked. Here's the sh*ter....I put the stud extractor piece on the ratchet and turned it a couple times Easy easy.... 2 turns later the bolt broke again... IN THE HEAD.... Damn.

My buddy had top of the line bits and easy outs ...... And skills.... And got it out. Pics to follow in my official write up. I took tons of pics.

Overall it's a one day job if you start early enough, I started at 1pm.

Fyii... OBX does not come with header bolts, and does not come with EGR block off plate which the hummer needs. A side from that fit was perfect.

More in the official thread with pics, to follow soon.

[H2Much]

Nice man, glad you got it put back together and got it set! I too had to remove broken bolts when I did mine, pain in the a**. Took an entire day's worth of time just working on getting the broken bolts out. Luckily Dynatech sent me all super nice bolts and everything, so I was good to go on that. Looking forward to seeing your pics- I should have documented my work to but didn't think about it.

[pdxrealtor]

Alrighty-- thanks to all who participated in this thread. It was great to have the discussion in preparation for the install.

My install is done. I'm happy with the mod, it was worth my time and money.

The write up is here http://www.elcovaforums.com/forums/s...ad.php?t=42833

I somehow posted it in the pictures section. I'm hoping GURUERROR can move it for me so that link might change.

Hope it helps... for those who buy and install the headers let us know how it goes for you.