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GMT K2xx Trucks General Discussion 2014+ Trucks | General Discussion
View Poll Results: 410s or longtubes
4.10 gears
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Longtube headers
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4.10s or longtubes

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Old 01-07-2019, 12:57 PM
  #31  
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00pooterSS

I'm just saying your arguing the point that you didn't feel any power difference or MPG gain. But you haven't had it re-tuned, Get it re-tuned and you'll change your mind.
Old 01-07-2019, 01:23 PM
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Originally Posted by 00pooterSS
Because I'm waiting for the tuner to get to me, I talked to him about tuning it and had a plan to tune it set up before I even installed them. I'm not a retard lol.



Speed engineering headers are really nice, and cost $400 with the Y pipe.

I'm sure it will pick up once tuned. Was just giving the feed back I have at hand right now. Will update when I get it tuned. I'll test at my test spot after the tune and see if it just sounds like it picked up power or actually did pick up power.

I installed the 3.5" exhaust this morning so now just waiting on toooner to get to my truck.
Gotta have cats. They don't offer with cats. I've got an email out to them to see if they've had a customer install cats with their true dual and headers.

Texas speed is about 5 miles from my house so I'll be going with them if Speed Engineering doesn't have a way to deal with cats.
Old 01-07-2019, 01:24 PM
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Originally Posted by arthursc2
even 3k is about twice what I would expect to spend on gears. I think you need new shops. Any small race/performance or trans shops around? I had my gears done at a local transmission place. Forgot what I paid, but I'll be going back to them with my 4.56s. They even asked me to bring my own stuff so they didnt get the wrong parts since my rear isnt OE to the truck.

Maybe your shops arent too hungry, and that was the go away price.
It's possible. I called the two local joints and that was the price with parts. Didn't spend time calling anyone else because I bought a Big Green Egg instead. Maybe once my bonus comes around I'll pick up the hunt then. I really would prefer gears over headers but not for that price.
Old 01-07-2019, 02:06 PM
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Originally Posted by Jonblarc7
00pooterSS

I'm just saying your arguing the point that you didn't feel any power difference or MPG gain. But you haven't had it re-tuned, Get it re-tuned and you'll change your mind.
I hear you loud and clear and agree.

Originally I made a comment about headers. Then within a week or so of that comment I had them on my truck and said btw after just throwing them on I don't notice a difference but maybe I will after tuning and i'll let you know then.

I mentioned several times that at this time it isn't noticeable but after a tune this and after a tune that. So to me I made it clear I'm getting it tuned. Maybe it wasn't as clear as I thought.

So I'm just giving info as I have it. And some people like to know what first impressions are and how it is before tuning and after.

However, I've modified enough cars to know when something is going to make a difference, not trying to brag but I've done pretty much every kind of build you can imagine and every bolt on there is and every power adder there is on all kinds of cars and motors... 23 years of repairing/building cars daily you kinda get a feel for when something has potential, even untuned. There's no doubt that they will add some power, but I get the feeling they won't make as much of a difference as they did on F bodies and other cars I've put headers on. Which after I looked at the Y pipe and catback on this truck closely, that's no surprise, the stock stuff is pretty damn good. So that leaves less room for improvement from headers. I went into this feeling the way I have always felt about headers.. but didn't realize how much better the stock stuff was compared to the ol F body days.


Some of this may seem contradictory, and it somewhat is because I initially posted in here with this vision of headers that is now kinda falling apart. But I am jumping the gun as you pointed out. I think I'm just bummed about it man.
Old 01-07-2019, 02:48 PM
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I get where your coming from but for the price if your going to get a tune anyway. I don't think headers are a bad investment.

I just didn't want people to think. Headers will give you no gains just because you didn't get it tuned for headers. And I agree with you that gears will give you a bigger seat of the pants feel. But unless you can install them your self. It's going to be triple the cost.

I wish I knew how to re-gear my truck. I would have already done it.
Old 01-07-2019, 03:31 PM
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Originally Posted by Jonblarc7
I get where your coming from but for the price if your going to get a tune anyway. I don't think headers are a bad investment.

I just didn't want people to think. Headers will give you no gains just because you didn't get it tuned for headers. And I agree with you that gears will give you a bigger seat of the pants feel. But unless you can install them your self. It's going to be triple the cost.

I wish I knew how to re-gear my truck. I would have already done it.

I agree, and I don't have to pay for a tune I've already paid and touch ups are free. Again if it wasn't clear for those reading my comment about headers it is untuned and it is getting tuned soon.

Doing gears isn't hard brain work necessarily, it is hard labor though and takes patience. The worst part is shimming the pinion and carrier to set your pattern. You need to get two inner pinion bearings and ream the inner shim out on one so that you can take it on and off as you shim and measure. For final assembly you press the new one down to the shims then install it. The crush sleeve is a pain too, you have to go real slow cause once it starts to crush you can over do it quick. They are cheap so getting two is a good plan. It does require a few specialty tools and patience. You'll need a dial indicator and an inch pound tq wrench, the cheap bar type works great. You can get the tools for under $100 I believe. I have taken carriers out before and swapped the diff only and slapped them back together with good luck. If you use the same OEM bearings which are usually timken you can often get by without setting up the rear since the same brands keep the same tolerances. I rebuilt my rear in my 04 truck and ordered a bearing kit from a local supplier, they didn't have the timken set so I got the national brand set and the bearing races and rollers were a different angle than the timken (angle of the wedge of the race and wedge of the rollers if that makes sense) which made us want to check the gear pattern even more than we had already planned to. It was a good thing we did because it did not lay a good pattern reusing the original shims in their original spot so we had to do a full new pattern setup and that can be a bit stressful but not undoable if you're patient. I had paid for a gear swap before using $300 AAM gears and an auburn and me doing my first full setup on gears was a hair quieter than the set I paid a pro rear end shop to do. So take that for what you will.

If you get timkens and a really good diff you can likely pull the carrier and keep track of which shims were where and slap it back together and likely be okay. But always run a pattern check.

When I did a yank and stick back I used an auburn.

Old 01-07-2019, 03:34 PM
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That 3k-3500 would make a lot more sense if it's 4wd and I didn't even ask if it was, just assumed it wasn't. Still seems a bit high but I've also never tore apart the front diff so it may be a major mf'er and that's why it's so high on price.
Old 01-07-2019, 06:21 PM
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I’m 4wd.

Got a nice canned response from Speed Engineering today:
Thank you for interest in our products. All our headers are advertised and sold as a race version header. They are intended for off road use and do not carry any CARB number or stamping for California emission purposes and are not smog compliant within the state. We have no knowledge of anyone modifying our kits to work for smog purposes.

So it looks like TSP headers are in my future unless I find a more reasonable shop to do gears. I don’t mind dropping a $1000 on install and $7-800 on parts. But $3-3500 is out of the question. For that money I could do a cam and long tubes.
Old 01-08-2019, 10:43 AM
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Originally Posted by Bgbldodge
I’m 4wd.

Got a nice canned response from Speed Engineering today:
Thank you for interest in our products. All our headers are advertised and sold as a race version header. They are intended for off road use and do not carry any CARB number or stamping for California emission purposes and are not smog compliant within the state. We have no knowledge of anyone modifying our kits to work for smog purposes.

So it looks like TSP headers are in my future unless I find a more reasonable shop to do gears. I don’t mind dropping a $1000 on install and $7-800 on parts. But $3-3500 is out of the question. For that money I could do a cam and long tubes.


**** for 3500 you could buy a 6.2 and swap that in (if you pay someone to put it in obviously it's higher) and not need the gears headers or cam. The 6.2, even though it isn't rated at a whole lot higher power, rolls the f out on 5.3's. I raced a buddy in his wife's 6.2 Yukon Denali 8 speed and ho ly ****. There's some videos on youtube of a crew cab 4wd 6.2 truck with a tune and intake vs a reg cab with intake headers exhaust and the 6.2 truck rapes the regular cab. And they both launch in 2wd. Both are 6 speeds too. After the 6.2 CC jumps out 2 cars the reg cab holds the gap but that's it. And it's about 700 pounds lighter with more mods.

Why do you have to have cats? The smell?

Last edited by 00pooterSS; 01-08-2019 at 10:49 AM.
Old 01-08-2019, 10:49 AM
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Found the vid



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