Where can I find a larger throttle body for the LQ4 intake?
I have seen that professional products has one but im pretty leery of anything they sell.

I think the stock one is in the 65mm or so range? Is there a larger factory one around? Are all the LS1/LS6 throttle bodies the same?

Im trying to find a larger TB for my 02 2500HD 6.0 but everywhere I google or search, I only turn up the professional products TB. Please tell me someone else makes one...

 

It uses a 78mm just like every other NBS. You can look into a Nick Williams 92mm throttle body, but you're going to need a NNBS or a FAST intake to take advantage of it. The difference between the truck and the car throttle bodies is the butterfly opens the opposite way.

 

BBK, but it's the basically the same as professional products.

 

55mm. Lmfao. Lol

 

I found out that BBK makes a 85 and 80mm version-

Worth the cash? And can the truck nylon intake be ported enough to actually USE that throttle body? Whats the most anyone has made HP wise through the stock 78mm TB?

 

You'd be better off swapping to a NNBS/TBSS and going with the 90/92mm throttle body instead of trying to port the stock 78mm opening.

 

Yea tbss intake a tb is the way to go.

 

Do they have that intake with a cable operated TB? I wouldn't mind doing the swap so long as everything bolts up and I can keep my cathedral port heads.

And of course, it needs to be able to support 600hp.

I know nothing of the tbss/nnbs yall speak about.

 

Look at this intake swap thread

https://www.performancetrucks.net/fo...9-02-a-459296/

 

trailblazer ss/new new body style...07+ intakes, they come stock with 90mm intake and throttle bodies if im not mistaken