Installing cat back exhaust

[wildrice]

The pipes that connect to the catalytic converter, on a 2000 NSX-T, are flared to fit a donut type of gasket. The pipes on the Arc Titanium cat-back exhaust that connect to the factory catalytic converter are made to fit a flat type of gasket. Does anyone out there know if this connection will work. Should the Arc Titanium elbows also have a donut type of gasket rather than the flat type of gasket? Will there be any problems trying to fit the flat gasket to the factory donut gasket?

Thanks.

 

[Sensei]

Without seeing what you actually have it's hard to say. First, did this exhaust come with a flat type gasket or is this your assumption by looking at it. The earlier stock NSX muffler has flat, 3-bolt flanges as well. After the cat there is 2-bolt flange which connects to a short piece of exhaust, followed by the 3-bolt flange. I would try using the old gasket first but I think the flat type will work. I would suggest incremently tighten the 3 bolts evenly for a good seal. The 2 bolt flange, which is spring loaded, seems to absorb most of the stress which may ordinarily cause leaks on this 3-bolt flange if one were to use a flat type.

 

[wildrice]

Yes, the exhaust came with a flat type of gasket with two bolt holes. There is a very short pipe coming out of the cat before it attaches to the muffler assembly. This is what I am referring to as being donut shaped whereas the elbow that came with the ARC is flat. I don't know what you are referring to when you speak about the 3 bolt flange. The flange that is donut shaped is the spring loaded 2 bolt flange and the flange for the ARC is a flat 2 bolt flange. The person that looked at the 2 bolt flat flange gasket did not think that the fit would be very good against the 2 bolt donut flange gasket (OEM) on the car. That is the basis of my question - will the flat type of flange gasket on the Arc mount properly to the donut type of OEM flange gasket?

 

[ScienceofSpeed]

Robert --

Can you take a picture?

-- Chris

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