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

[Sam Harris]

Yeah, I see no reason why it wouldn't. There may be small differences in the length and arrangement.

For my '08 Denali it was:

Two 4in sections of 3in pipe (to join the elbows)
One 45 degree street elbow (connects to MAF)
One 60 degree regular elbow
One 90 degree street elbow (connects to throttle body)
Two 3in Fernco's w/clamps
One 3/8 barbed 90 degree threaded fitting
One foot of rubber 3/8 ID tubing


If I were going to build another one, I might try using a 60 degree street elbow in place of the 90 to connect to the throttle body. At least on my vehicle it kind of curls back a bit inside of the Fernco boot, making a not so smooth transition. The 90 degrees was a little too much. I think 60 would have been more ideal.

I drilled and tapped the barbed fitting into the backside of the 60 that connects to the line down near the top of the passenger side valve cover. Where the fitting goes into the 60, I used some liquid electrical tape to ensure I had an airtight seal. All of the unions are just glued with regular PVC cement.


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@Hi-psi So.. I ah, got mine installed today:

 

[gooffeyguy]

@Hi-psi So.. I ah, got mine installed today:
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Cleanest thing in there.... Lol

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[Sam Harris]

Cleanest thing in there.... Lol

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

Yes. Embarrassingly dirty. Can’t wait for spring, so I can give it a proper detail!


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[Chrismnj]

 

[Tonyrodz]

View attachment 218014

I like it. It's the little touches.

 

[Tonyrodz]

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Just curious--have a link for those?

 

[Chrismnj]

I like it. It's the little touches.

Let’s hope I can back it up now.

 

[Chrismnj]

Just curious--have a link for those?

(2X) Funny Buckle Up Warning Sticker Set Vinyl Decal For Car Truck SUV Dashboard https://www.amazon.com/dp/B075R21FDW/ref=cm_sw_r_cp_api_i_f-RFCbXQFAQMZ

 

[Tonyrodz]

Let’s hope I can back it up now.

From reading your build, I don't think you'll have a hard time lol.

 

[kbuskill]

Definitely interested to see how this will sound. Been thinking of going with one of these for a while now, but looking at the shorter 27" body 2.5" since ill be using the factory 2.75" pipe. I've finally gotten to the point i don't want a loud vehicle anymore, yet stock is too quiet. Have had thoughts of 3rd cat, and rear resonator delete. But not sure it's going to be a big enough difference to be worth the cost. Had Gibson M.W.A on my Silverado and the "No drone" is true to a point, still had drone under load on highway and under accel in town.

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Mine may not give you an accurate depiction of how it will sound as I have JBA headers and no cats.

Removing the cats made a HUGE difference in sound. I was shocked at how much louder it was without cats to be honest.

Either way, I will be sure to post a video once I get it put on... I hope I'm happy with it.