What did you do to your NNBS GMT900 Tahoe/Yukon Today?

randeez · Feb 19, 2019

kbuskill said:
No not really... they were put on last Saturday and I went to church Sunday and had the cats removed Monday... lol

with mine i couldnt get it quiet enough (dumb i know trying to quiet down longtubes/no cats/4" all the way out with straight thru mufflers).. but i have a 6" and a 30" and was going to try and stuff another 6" or 12" straight thru muffler probably where the stock resonator was.

CHOO CHOO · Feb 20, 2019

kbuskill said:
Yeah... I'm still not certain that I made the right decision.

Adding the second muffler definitely toned it down to where it is tolerable.

Kind of wish I would have left well enough alone and saved the money... lol

I can't really tell that it made any really difference from a performance stand point.

If anything I feel like maybe it lost a little bottom end... which is what I was trying NOT to do.

What are your thoughts on that. Do you feel like you lost any torque/bottom end by going catless???

I have no bottom end at all. This thing is slow as hell "off the line". Never been to a drag, but it sucks trying to beat a car at a red light. I noticed a difference in mid-high end torque. It's fine by me, because if I need to pass, I can with ease. Third gear is great for me.

I added long tubes and took the cats out at the same time so I can't just say if it's cats or the combo together.

I suck at terminology on all this so I could be wording what I'm trying to say wrong.

Wolfbraid · Feb 20, 2019

CHOO CHOO said:
I have no bottom end at all. This thing is slow as hell "off the line". Never been to a drag, but it sucks trying to beat a car at a red light. I noticed a difference in mid-high end torque. It's fine by me, because if I need to pass, I can with ease. Third gear is great for me.

I added long tubes and took the cats out at the same time so I can't just say if it's cats or the combo together.

I suck at terminology on all this so I could be wording what I'm trying to say wrong.

Might need a tune with all the extra flow?

Chrismnj · Feb 20, 2019

Now that's a customer service.

swathdiver · Feb 20, 2019

CHOO CHOO said:
I have no bottom end at all. This thing is slow as hell "off the line". Never been to a drag, but it sucks trying to beat a car at a red light. I noticed a difference in mid-high end torque. It's fine by me, because if I need to pass, I can with ease. Third gear is great for me.

I added long tubes and took the cats out at the same time so I can't just say if it's cats or the combo together.

I suck at terminology on all this so I could be wording what I'm trying to say wrong.

3.08 gear Phil?

I remember @badandyturbo Andy's Tahoe has a tune and he added those Amazon long tubes and makes a solid 320 RWHP, 20 HP more than mine which just has a tune. If I remember right, his ran 15.40s.

And Ken, too many changes now brother! Going to be hard to know what's done good and what did nothing and what might have hurt. Speaking of hurt, how's the differential?

osiris94ej · Feb 20, 2019

Doubeleive said:
they don't show it installed?

Hope this helps. This is out of my 11 Silverado z71.

Sent from my SM-N950U using Tapatalk

Sam Harris · Feb 20, 2019

Chrismnj said:
Now that's a customer service. View attachment 216966

[emoji23][emoji1787]

Sent from my iPhone using TapaBlah

CHOO CHOO · Feb 20, 2019

Wolfbraid said:
Might need a tune with all the extra flow?

Already bbtuned by Justin.

swathdiver said:
3.08 gear Phil?

I remember @badandyturbo Andy's Tahoe has a tune and he added those Amazon long tubes and makes a solid 320 RWHP, 20 HP more than mine which just has a tune. If I remember right, his ran 15.40s.

And Ken, too many changes now brother! Going to be hard to know what's done good and what did nothing and what might have hurt. Speaking of hurt, how's the differential?

Not sure [emoji1745]I've never changed them so if that is what is stock from factory, then yes. I have the Dyno results somewhere on here or at home. It was putting out 307 at the wheels and torque was 290+ I think. That was with 22's on. I'd like to change some things, but it is still my daily and family hauler so i want to keep it somewhat of a family car. I just have a lot going on and we are trying to buy some property (cabin and a few acres) so the Tahoe is not high on the priority list sadly.

Fosscore · Feb 20, 2019

kbuskill said:
Went catless today...

I'm not convinced that I like it. It is louder and definitely has more growl/rasp than it did before.

I think I will probably drive it for a few days and see but most likely gonna get a resonator or something to tone it down a bit.

I honestly didn't expect it to make that big of a difference in sound.

Nasty tunes!! I like, but understand the tone for the land yacht.

Chrismnj · Feb 20, 2019

Getting ready to install ABS fuse brake disconnect switch in the cabin, which will require me to pull out the top portion of the fuse box under the hood. Will this cause any problems with the computer or any other truck electronics? That will require a trip to the dealer for programming?

What did you do to your NNBS GMT900 Tahoe/Yukon Today?

randeez

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CHOO CHOO

BackPagePhil

Wolfbraid

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Chrismnj

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swathdiver

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osiris94ej

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Sam Harris

CHOO CHOO

BackPagePhil

Fosscore

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Chrismnj

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