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

[Rocket Man]

Had to replace the driver side view mirror glass after breaking it backing out of my new garage. Went OEM since it’s got the auto dimming etc. The first one I got was defective and looked like a fun house mirror. The second one was perfect. I can guarantee that won’t happen again.

If it was OEM I doubt it was defective, those are expensive as hell. What did you pay, $200-300? Might not have got it snapped in all the way. That happened to me. One of the clips wasn’t seated.

 

[iamdub]

Thanks Tony! It’s got the ARH Longtubes with cats, and stock pipes, but with muffler replaced with an 18” magnaflow, and deleted resonator. Actually, I was suppose to tell @iamdub the rpm where I get the most drone with this exhaust, to look into a Helmholtz resonator IIRC. So, iamdub, it’s worst at 2k, which I suspect is quite common.

Having it at your normal cruising RPM makes it worse! For a drone at 2,000 RPM, you'll need a 25.2" (640.08mm) resonator. I'd aim for a pipe the same as the factory pipe's diameter but no smaller than 2". The straighter, the better, but 25" of pipe can be tough to stuff. (giggity)

Also, you want it as close to the source as possible. Off the top of my head, I'm thinking it could come off the Y and run parallel to the crossover pipe. You may have a slight bend in it where it first comes off the Y, but you should be able to get the rest of the length as a straight shot. You could attach it to the crossover pipe to secure it.

 

[Sam Harris]

Having it at your normal cruising RPM makes it worse! For a drone at 2,000 RPM, you'll need a 25.2" (640.08mm) resonator. I'd aim for a pipe the same as the factory pipe's diameter but no smaller than 2". The straighter, the better, but 25" of pipe can be tough to stuff. (giggity)

Also, you want it as close to the source as possible. Off the top of my head, I'm thinking it could come off the Y and run parallel to the crossover pipe. You may have a slight bend in it where it first comes off the Y, but you should be able to get the rest of the length as a straight shot. You could attach it to the crossover pipe to secure it.

Thanks man! I’ll try to get this done. Going to be a challenge!

 

[Rocket Man]

Having it at your normal cruising RPM makes it worse! For a drone at 2,000 RPM, you'll need a 25.2" (640.08mm) resonator. I'd aim for a pipe the same as the factory pipe's diameter but no smaller than 2". The straighter, the better, but 25" of pipe can be tough to stuff. (giggity)

Also, you want it as close to the source as possible. Off the top of my head, I'm thinking it could come off the Y and run parallel to the crossover pipe. You may have a slight bend in it where it first comes off the Y, but you should be able to get the rest of the length as a straight shot. You could attach it to the crossover pipe to secure it.

Where do you get this info regarding resonators?

 

[iamdub]

Where do you get this info regarding resonators?

Interwebz- Wikipedia, geek sites, car forums, etc. Was researching Helmholtz resonators a while back for some reason and am really intrigued at the scientific application. It being a cheap, simple and harmless (non-restrictive) solution makes it that much better. I'm actually kinda hoping I have some drone when I get my exhaust sorted out just so I can play with it.

 

[Rocket Man]

Interwebz- Wikipedia, geek sites, car forums, etc. Was researching Helmholtz resonators a while back for some reason and am really intrigued at the scientific application. It being a cheap, simple and harmless (non-restrictive) solution makes it that much better. I'm actually kinda hoping I have some drone when I get my exhaust sorted out just so I can play with it.

Aha. The great treasure trove of knowledge. I started to think you used to work at an exhaust shop in a prior life. Should have known better.

 

[Fless]

Man, that was some work, and now I'm exhausted!

 

[Danny3737]

If it was OEM I doubt it was defective, those are expensive as hell. What did you pay, $200-300? Might not have got it snapped in all the way. That happened to me. One of the clips wasn’t seated.

It was definitely defective. You could tell before I even tried to snap it in. The dealer wanted close to $500, but I bought It online from another dealer in MD for $245.00 + shipping. I held the 2 side by side before I shipped the bad one back and there was a huge difference in the quality.

 

[Rocket Man]

It was definitely defective. You could tell before I even tried to snap it in. The dealer wanted close to $500, but I bought It online from another dealer in MD for $245.00 + shipping. I held the 2 side by side before I shipped the bad one back and there was a huge difference in the quality.

Weird, you can get a funhouse one on EBay with turn signal, heat and dimming for $40 all day if you can look at it without getting dizzy lol.

 

[Tonyrodz]

Got dem thangs!
Now I need lugs, spacers and bolts! DAMMIT Anybody ?