What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Tonyrodz]

Ok, so I got the American Racing Longtubes installed last week. I had some issues directly afterward, as the spark plugs were not all fully seated, and had to figure out what the noise was and get it addressed. After installing the headers, the spark plugs are really difficult to access, and they feel tight when they are not, since the socket tends to hangup on the outside edges. Needless to say, it’s taken me a bit to get some before/ after videos. I now have the headers (with cats), and an 18” magnaflow muffler (sorry, don’t know model -think it’s: 12259) Really digging the Accel Ceramic wires (9070C). They’re the perfect length, and stay out of the way of the headers.

Here are some clips. Not the best quality, and you really need to play on a system with a subwoofer, so you can hear the lower tones.



Before headers 30-70:

After headers 30-70:

Warm start:

Stock:

Headers installed:

Headers + Magnaflow:

And a few (albeit ******, but obligatory) photos:


Next up on my list is a Black Bear tune!

And your 4wd still works! Nice.

 

[89Suburban]

Leveled my 05 (Keys and z71 springs. No spacers in the rear)
275/70r18 BFG KO2s
2016 18" take-off wheels

Next is going to be doing something with the running boards. I like having them, but the factory plastic ones are faded and look terrible.



View attachment 232063

Beautiful!

 

[HiHoeSilver]

They're cheap MOTO FAB keys off amazon (1"-2.5" I believe). The bolts on the keys are in roughly the same as they were from the factory. I didn't count turns. Its a little stiffer but that's with the bars cranked and MUCH stiffer tires. Overall I'm still happy with the ride. Haven't done shocks because the truck has AC Delco shocks that probably have less than 10k miles on them. If I have any issues I'll probably go to 5100s.

For the rear I used Moog 81069 springs. No additional spacers or anything. Might add some airlift bags. Depends on how much it sags when I hook my boat to it.

Fender heights are 38.75 front and 39.25 rear. I'm expecting the rear to settle some and I didn't want to crank the keys any more.

I have not trimmed anything and it does not rub even at full lock forward or reverse.

The pictures really don't do it justice. I am thrilled with how it came out.

Thanks for amazing info.

 

[Bombsquad85]

Ok, so I got the American Racing Longtubes installed last week. I had some issues directly afterward, as the spark plugs were not all fully seated, and had to figure out what the noise was and get it addressed. After installing the headers, the spark plugs are really difficult to access, and they feel tight when they are not, since the socket tends to hangup on the outside edges. Needless to say, it’s taken me a bit to get some before/ after videos. I now have the headers (with cats), and an 18” magnaflow muffler (sorry, don’t know model -think it’s: 12259) Really digging the Accel Ceramic wires (9070C). They’re the perfect length, and stay out of the way of the headers.

Here are some clips. Not the best quality, and you really need to play on a system with a subwoofer, so you can hear the lower tones.



Before headers 30-70:

After headers 30-70:

Warm start:

Stock:

Headers installed:

Headers + Magnaflow:

And a few (albeit ******, but obligatory) photos:


Next up on my list is a Black Bear tune!

Do you have a link to these headers?

 

[Rocket Man]

Do you have a link to these headers?

https://americanracingheaders.com/collections/gm-truck

 

[Sam Harris]

And your 4wd still works! Nice.

Yessir! These headers fit perfectly!

 

[SteveB]

Sounds good Sam.

 

[Sam Harris]

Do you have a link to these headers?

You should be able to search: GM53-99134300LSWC

 

[Sam Harris]

Sounds good Sam.

Thanks Steve! It’s a little louder than I had planned on, but the sound is addictive. Now I just want to go drive around. Not that I needed any help in that direction.. lol.

 

[Tonyrodz]

Thanks Steve! It’s a little louder than I had planned on, but the sound is addictive. Now I just want to go drive around. Not that I needed any help in that direction.. lol.

Drive around and NAIL IT lol!!