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Old 12-17-2015, 01:31 PM   #1
LeesTruk
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Factory exhaust manifold question

Ok, this is just for practical knowledge. What's the difference, if any, between the TBSS exhaust manifolds and the Trailblazer/Buick Rainier 5.3L exhaust manifolds. Everyone jumps on the TBSS manifolds as the "gotta have" cast iron piece, but is there really any difference?
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Old 12-17-2015, 05:52 PM   #2
dayj1
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Re: Factory exhaust manifold question

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Originally Posted by LeesTruk View Post
Ok, this is just for practical knowledge. What's the difference, if any, between the TBSS exhaust manifolds and the Trailblazer/Buick Rainier 5.3L exhaust manifolds. Everyone jumps on the TBSS manifolds as the "gotta have" cast iron piece, but is there really any difference?
They are exactly the same parts.
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Old 12-17-2015, 06:07 PM   #3
BR3W CITY
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Re: Factory exhaust manifold question

The only difference is the price, and the chances that it'll still hve the rusty heat shield attached.
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Old 12-17-2015, 09:24 PM   #4
LeesTruk
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Re: Factory exhaust manifold question

Kinda what I thought. Maybe it's the mystique of the TBSS acronym that makes them so precious?
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Old 12-17-2015, 11:14 PM   #5
BR3W CITY
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Re: Factory exhaust manifold question

Well its just that when the Trailblazer and Envoy first debuted, the 5.3 wasn't available, so the only place to get them was the TBSS. Then they released both with the 5.3, as well as the Saab 97x and the H3 Alpha which also used them.
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Old 12-17-2015, 11:40 PM   #6
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Re: Factory exhaust manifold question

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Originally Posted by BR3W CITY View Post
Well its just that when the Trailblazer and Envoy first debuted, the 5.3 wasn't available, so the only place to get them was the TBSS. Then they released both with the 5.3, as well as the Saab 97x and the H3 Alpha which also used them.
You forgot the Isuzu Ascender....
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Old 12-17-2015, 11:50 PM   #7
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Re: Factory exhaust manifold question

Yeah... Who could forget that?
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Old 12-18-2015, 12:56 AM   #8
BR3W CITY
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Re: Factory exhaust manifold question

Actually, Isuzu medium duty trucks is a great place to find 6.0's. GM sells the 6.0 to Isuzu from a 3rd party mfg.
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Old 12-18-2015, 01:22 AM   #9
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Re: Factory exhaust manifold question

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Actually, Isuzu medium duty trucks is a great place to find 6.0's. GM sells the 6.0 to Isuzu from a 3rd party mfg.
An Isuzu tilt cab is an excellent source for a nice factory looking air intake tube. We had one in the shop last week and it looks similar to the Workhorse part I used but it faces the inlet where the filter would go to the rear instead of to the front like the Workhorse part does. Can't remember if I took a pic of it or not. I'll have to look!
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Old 12-18-2015, 09:55 AM   #10
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Re: Factory exhaust manifold question

I believe the "TBSS" part comes from the fact they are easily available since most people are modding their SS's. Soccermoms aren't really swapping out their 5.3L's manifolds for headers.
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Old 12-18-2015, 11:28 AM   #11
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Re: Factory exhaust manifold question

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I believe the "TBSS" part comes from the fact they are easily available since most people are modding their SS's. Soccermoms aren't really swapping out their 5.3L's manifolds for headers.
Truth. I looked up the part numbers for the manifolds and cross referenced everything on ebay. In the end, I got the best deal on a set of used ones on a TBSS forum.
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