whats the differance bettween the stock intake on my 2007 nbs 4.8? and the tbss intake i keep reading about? and will the tbss fit on my 4.8?

 

The TBSS/NNBS intake is a better design effecting gains everywhere in the power curve. If you get a complete one (intake, TB, fuel rails, etc) it should just be a plug in play along with a TB adapter for the electrics, but I have seen some folks engineer their old fuel lines onto a bare intake and go from there. You can also get an adapter to run your 78mm TB, but you'll probably be limiting the gains from the intake a bit.

 

Is the TBSS intake and NNBS intake the same??

 

For all intents and purposes, yes, but I think I recall reading about some minuscule differences. I wouldn't worry about them though, just grab an NNBS if you can.

 

ok!

 

What is needed to hook up sensors from the old intake to the new-anything to adapt over, replace or get rid of? The one I have is the rectangular port L92 style. Some of the hookups look like they may not be the same.

 

The rectangular port intake won't work on cathedral port heads and vice versa.

 

So you have an L92 intake? On a TBSS intake swap, you have to pull the MAP sensor wires out of the harness a few inches, tune out and remove the evap, and splice in injector pigtails depending on what your doing for injectors. You can do pretty much whatever you want with the PCV system. Do a search, there are quite a few write up's on it.

 

Running L92 heads, but thanks.

My concern in doing all that is keeping it emissions legal. To get an engine swap(what I'm doing) passed here in Nevada, the DMV has to smog your vehicle the first time in order for them to bless off on it. Wouldn't screwing with all that stuff be fairly obvious to them?

 

The computer doesn't know anything about the PCV system, the EVAP you can actually install the NNBS stuff on your system. I have the full EVAP set up on my TBSS intake on my 2001.