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Throttle body gasket question.

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Old 07-12-2014, 08:10 PM
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Car: 1989 Iroc-z
Engine: 350 TPI
Transmission: Auto 700R4
Axle/Gears: 9 bolt - 2.77
Throttle body gasket question.

I'm going to be changing the intake an plenum gaskets on my 89 iroc with a 350 TPI. Since I will have everything apart, I figured I'd change the TB gasket as well. When looking at gaskets, I've always seen that there is 2 TB gaskets included in a set or if bought individually, there is 2 to choose from. From what I've read, 89 was a 1 only year for the TB design. Does anyone know which one I should use in the pics attached? Or do I match the gasket to the design of the gasket surface on the TB? Thanks.
Attached Thumbnails Throttle body gasket question.-tb1.jpg   Throttle body gasket question.-tb2.jpg  
Old 07-13-2014, 06:30 AM
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Car: '87 IROC
Engine: LB9
Transmission: TH700R4
Re: Throttle body gasket question.

Maybe this might help. See post #11:

https://www.thirdgen.org/forums/tpi/...dy-gasket.html

Most upper manifold gasket sets (plenum to runner) come with both style TB gaskets. Just match up the old gasket to either one of the new ones.
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