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Old Feb 2, 2020 | 09:02 AM
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Default TBSS intake

Anybody know if the intake on LS on a Buick Rainier or Envoy XL is the same as TBSS? See a few of them in junkyard wonder if it’s worth picking it up for a later project.
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Old Feb 2, 2020 | 12:03 PM
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Originally Posted by JinglingBaby
Anybody know if the intake on LS on a Buick Rainier or Envoy XL is the same as TBSS? See a few of them in junkyard wonder if it’s worth picking it up for a later project.
If it's on a 5.3 it is not the TBSS manifold. It is almost as good though.
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Old Feb 2, 2020 | 12:19 PM
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Thanks, I’ll pick one up it’s cheap and better than a truck manifold.
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Old Feb 2, 2020 | 02:05 PM
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Originally Posted by G Atsma
If it's on a 5.3 it is not the TBSS manifold. It is almost as good though.
I was under the impression that any of the later 4.8/5.3 (with 799/243 heads) had the same intake as the TBSS?
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Old Feb 2, 2020 | 04:54 PM
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Originally Posted by Ls7colorado
I was under the impression that any of the later 4.8/5.3 (with 799/243 heads) had the same intake as the TBSS?
They're basically the same. The only real differences are things like mounting tabs for the covers etc.

OP, the 05 and some of the 06 stuff had a gen 3 truck intake with a 4 bolt TB and larger opening. I've never seen a dyno test done on one.
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Old Feb 2, 2020 | 05:28 PM
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Didn't they put the same intake on later model trucks? I have what looks like a TBSS intake off a 2010 4.8 L20, even has the big injectors

Heres a dyno test

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Old Feb 2, 2020 | 05:33 PM
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There were cathedral as well as square port versions too correct?
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Old Feb 2, 2020 | 09:56 PM
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Is it a pain in the *** to run these on a gen 3 truck?
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Old Feb 2, 2020 | 10:57 PM
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Originally Posted by 4EyedTurd1
Is it a pain in the *** to run these on a gen 3 truck?
No. You need to figure out a throttle cable bracket if you have a cable TB. You need to get a TB if you don't already have a four bolt.
The map sensor seemed weird to me so I put the gen 3 sensor in it, it's not a direct swap but close. My map sensor wire wasn't long enough so I had to extend it.
If you want to run a factory vacuum referenced FPR type fuel rail you need to get creative to make it fit.
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Old Feb 3, 2020 | 07:43 AM
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Get a short MAP sensor extension harness.

If you have the factory return style gen 3 truck rails and want to reuse them, you can shorten up the mounting tabs on the rails until you're able to get them over the intake, and then drill new holes.
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Old Feb 4, 2020 | 05:14 PM
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Yes it should be. If its a 4 bolt throttle body and 87mm inlet on intake snout ( bigger than 78mm and 3 bolt tb) then yes! I've picked a few off 5.3s in envoys, rainers and trailblazers... All were gen 4 i takes and had ls2 heads.



Originally Posted by JinglingBaby
Anybody know if the intake on LS on a Buick Rainier or Envoy XL is the same as TBSS? See a few of them in junkyard wonder if it’s worth picking it up for a later project.
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