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Desert Rat 04-15-2011 08:57 PM

Are these cats????
1 Attachment(s)
Just bought a 1983 GTV6...these are in the exhaust system, within a few inches of the exhaust manifolds. There is also no O2 sensor...??? This set up can't be right.....any comments?

Greg Gordon 04-15-2011 09:28 PM

Strange, the one on the right appears to be a cat, and the one on the left a small muffler. It's not a stock configuration or any know aftermarket set up. I would replace it.

Silicone Hose Kits

fatdarryl 04-20-2011 01:44 PM

Did US gtv6s have cats that long ago? Looks like different sections of the exhaust have just been renewed at different times with different parts. Maybe a PO has replaced a part of the system with a milano part? Either way, seems like a good excuse for a nice fresh system!

papajam 04-20-2011 02:53 PM


Originally Posted by fatdarryl (Post 998970)
Did US gtv6s have cats that long ago?

In the US, cats started appearing about 1974 and within a few years, virtually all passenger vehicles with petrol engines had them.
All USA version GTV6s, 1981-1986, were fitted with factory cats.

hotlegs32 04-20-2011 06:11 PM

Sorry, looks like a case of cats and dogs to me! In other words, needs a new cat system. To be USA legal. If that is your thing. And new proper cats won't really hurt performance.

PAUGNUT1275 04-25-2011 05:32 AM

It appears that one of these is a Euro down pipe with it's small muffler. The other is a small replacement muffler in the Euro pipe. As several others have indicated, they are not Cats and probably should be replaced.

Desert Rat 04-25-2011 07:27 PM

I kinda knew this was some mickey mouse system someone put on. When I get my new engine gut feeling tells me to go ahead and get a cat system with an O2 sensor hooked up from the start.

PAUGNUT1275 04-27-2011 06:20 AM

Your engine will run better with a functioning O2 sensor.

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