Catalytic Converter

L

LXXXVII

Member
Joined
May 5, 2017
Looking for an original catalytic converter for a <10k mile 1987 GN
Gutted is preferred. Must be in grade A shape. Shipping to Chicago suburbs or will pick-up locally (preferred).
 
I have one, not sure it is considered to be grade a condition. But it is an original


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I have this one not original but it is new!
ccc2e85d275da91243f9fd84511aab44.jpg



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$175 shipped


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The one I have looks factory on the out side but has been gutted on the inside. It has a 3-inch on one end to accept the down pipe.

I will take some pictures if interested. I am in 40229.
 
michael evans said:
The one I have looks factory on the out side but has been gutted on the inside. It has a 3-inch on one end to accept the down pipe.

I will take some pictures if interested. I am in 40229.
Click to expand...
Yes I am interested. The 3" on the down pipe end...is that for a stock set-up? Or is the 3" larger than stock? Sorry for the remedial question, I am learning throught this process.
 
LXXXVII said:
Very interested. What do you mean by not original?
Click to expand...

This Cat is an aftermarket cat Poston sold these years ago. It will accept a stock down pipe of 2-1/2" and will fit in the same place as a stock converter. Has the four bolt flange and gasket to bolt right in. It is not an original converter but it is better flowing and fits in stock location. I haven't used this cause in PA here once we get Classic / Antique tags we are exempt from emissions.


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TRICKSIXPA said:
This Cat is an aftermarket cat Poston sold these years ago. It will accept a stock down pipe of 2-1/2" and will fit in the same place as a stock converter. Has the four bolt flange and gasket to bolt right in. It is not an original converter but it is better flowing and fits in stock location. I haven't used this cause in PA here once we get Classic / Antique tags we are exempt from emissions.


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Click to expand...


Thank you. Couple comments / questions... I too an exempt from emissions in Illinois. The condition is exactly what I am looking for but I am slightly hesitant since it is aftermarket. I have a 9k mile car and just purchased the reproduction exhaust from Highway Stars. My goal is to present a stock / period correct GN. In your opinion, does the Poston CC you have fit this goal? Thanks. -Larry
 
The banged up converter that is pictured above with the duct tape on it is what an OEM one looks like. This one if a Turbo Buick guy looks under the car will notice that this is not OEM. Anybody else will not know the difference. Look at the picture I posted and look at the Original one they are not the same. This converter will fit right in and is new.


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TRICKSIXPA said:
The banged up converter that is pictured above with the duct tape on it is what an OEM one looks like. This one if a Turbo Buick guy looks under the car will notice that this is not OEM. Anybody else will not know the difference. Look at the picture I posted and look at the Original one they are not the same. This converter will fit right in and is new.


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Click to expand...
Thank you. At this point in my search, I'm going to keep looking for an OEM. If things change, I'll let you know.
Appreciate your input re: differences.
 
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