You just answered my question. I will try to find the ls1 steam vent setup. Thanks

 

Correct me if I'm wrong but didn't the 99-02 trucks come with the 4 corner vent tubes? That's what I'm running on my 04 with a TBSS intake and all fit perfectly fine. I got them from my father in law who had them just sitting in his garage so when i swapped intakes i swapped out the vent tubes as well. I wasn't sure what they came off of or if they would clear the intake, that's just what he told me he got them off of was an older model truck motor.

 

yea, they did.

 

I have a supposed 2001 5.3 and it had the two rear vents blocked off. I'll be buying the 4 corner ls1 tube then since I am running the NNBS/TBSS/GMT-900 intake.

 

My 01 5.3L had the rear ports blocked as well. I swapped to the LS1 tubes that have all four corners.

 

My 99 5.3 had the 4 corner thing

 

Maybe it just depended on how someone felt on the assembly line that day

 

I have seen the steam vent fittings that go to 4 an male. But the fittings that you put on top are -4an 90's to barbed 5/16 or 3/8? What size line did you run for all those? I think I am going to run my lines like yours instead of getting the ls1 hard line. Since I have copied your whole fuel system why not this too! lol.

 

Its a trickflow kit I got off summit. Hose is 1/4"

 

Old thread but I had never seen the factory 4 corner steam pipe.

This is off of my 2000 Silverado 5.3L.



The 2005 6.0L I'm swapping in had the rear ports blocked off. Why isn't everyone just running this factory piece?