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wtf donut gasket

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Old 12-03-2015, 10:41 AM
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Default wtf donut gasket

i have a 99 honda civic ex with a b18c itr swap in it it has a tri y apexi header trash yeah i know it has like a 2 to 2.5 in outlet and my exhaust is 60mm im having a hard time finding out what donut gasket to use to connect from the header to the exhaust someone please help me out
Old 12-03-2015, 11:21 AM
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Default Re: wtf donut gasket

I'm not 100%, but I think an S2000 gasket would work.





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Old 12-03-2015, 12:33 PM
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Default Re: wtf donut gasket

Originally Posted by eHMxhACk
I'm not 100%, but I think an S2000 gasket would work.

Your the man bro what year s2000?



eH.
Old 12-03-2015, 12:40 PM
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Default Re: wtf donut gasket

Look at part number 18229-PCX-003.





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Old 12-03-2015, 07:29 PM
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Default Re: wtf donut gasket

Originally Posted by eHMxhACk
Look at part number 18229-PCX-003.

I looked up the part number but its one of those flex gaskets any that are the same size but not flex ?



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Old 12-03-2015, 08:25 PM
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Default Re: wtf donut gasket

Specifically, what junction/flange are you mating? The bottom of the header to the catalytic converter/test pipe? (This is a flex gasket)

Or are you trying to find the gasket between the tri y's of the two piece header? (This is typically a 2 hole flat gasket)

Or the gasket on the back side of the catalytic converter/test pipe to your long pipe? (This is typically one large hole triangular shaped flat gasket)

Flex gasket is a doughnut gasket that the catalytic converter can "flex" on with the spring bolts and still seal.
Old 12-03-2015, 08:26 PM
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Default Re: wtf donut gasket



This is the P# he gave you. That's a doughnut gasket. Also called a crush gasket. It's what you need.
Old 12-03-2015, 08:31 PM
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Default Re: wtf donut gasket

It's also called a flex gasket by many sources, Honda included.

But I also explained why the terminology is used.

27
18229-SR0-003
Gasket, EX. Flexible
1 $15.75 $10.87 Submit
28
18229-SH3-X30
Gasket, EX. Flexible (50mm-64mm)
1 $25.00 $17.25 Submit

Pulled for my car but the same location just different sized gasket.

Honda Part No.: 18229-PCX-003
Gasket, EX. Flexible
Fast Delivery
Dedicated Service
Guaranteed Genuine
Your Price: $23.63
Retail Price:$34.25
You Save:$10.62
Qty:
Add OEM Honda Gasket to Cart
Old 12-03-2015, 09:13 PM
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Default Re: wtf donut gasket

Originally Posted by TomCat39
Specifically, what junction/flange are you mating? The bottom of the header to the catalytic converter/test pipe? (This is a flex gasket)

Or are you trying to find the gasket between the tri y's of the two piece header? (This is typically a 2 hole flat gasket)

Or the gasket on the back side of the catalytic converter/test pipe to your long pipe? (This is typically one large hole triangular shaped flat gasket)

Flex gasket is a doughnut gasket that the catalytic converter can "flex" on with the spring bolts and still seal.
It is a 1 piece header apexi 4:2:1 and from the header to test pipe i just wanna be sure that's the size before i order from honda you have been a lot of help man I'll buy it tomorrow and keep you updated on how it goes
Old 12-04-2015, 09:51 AM
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Default Re: wtf donut gasket

I think the S2000 flex gasket might be a bit big.

Did you say your outside diameter of the header was 2.0"?

If so the flex gasket on the S2000 is for 2.5" and doesn't fit.

I am thinking your header output size is the same as my two piece one and the S2000 flex gasket was much too large.

What I found fit the 2" pipe was the Walker 31357 flex gasket.
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