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Adding cats to Tsp true dual

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Old Jun 23, 2012 | 08:17 AM
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Default Adding cats to Tsp true dual

Has anyone done this, and if do where did you mount them and how hard was it to add them?
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Old Jun 23, 2012 | 08:27 AM
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Just cut out a section of pipe from the front of the DUALS and weld on your cats.... Done. I would clamp DUALS to headers tho... Do not weld DUALS to headers!
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Old Jun 23, 2012 | 10:48 AM
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WHY?? unless you have to..
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Old Jun 23, 2012 | 10:57 AM
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Kind of defeating the purpose of the true dual setup IMO. WHat purpose are they going on there for?
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Old Jun 23, 2012 | 11:58 AM
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Just get some bullet cats, cut and weld as close to the collector as you can
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Old Jun 23, 2012 | 02:57 PM
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Originally Posted by justin hover
WHY?? unless you have to..
Current set up is long tubes, 3in ofy, hooker muffler. I moved to a emission testing state so now I need cats. Don't want to go back to stock manifolds, so I was trying to think of the best way to add cats without losing power or sound tone/quality. Seemed like the best solution would be tsp duals with cats added.
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Old Jun 23, 2012 | 03:13 PM
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Originally Posted by simplysix
Current set up is long tubes, 3in ofy, hooker muffler. I moved to a emission testing state so now I need cats. Don't want to go back to stock manifolds, so I was trying to think of the best way to add cats without losing power or sound tone/quality. Seemed like the best solution would be tsp duals with cats added.
Since this emission come around so much, I would invest in another exhaust to put on just for emissions testing, then take it off and put your tru duals back on.
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Old Jun 23, 2012 | 03:58 PM
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What is wrong with catted duals? I had some on my LT1 and will be adding some to my GTO
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Old Jun 23, 2012 | 11:41 PM
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I want to see pictures of exact places cats where mounted
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Old Jun 24, 2012 | 12:06 AM
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Originally Posted by simplysix
I moved to a emission testing state so now I need cats.
TSP true duals might not be the answer. Depends on the type of emissions testing and who does it.

For example, here in PA we have emissions testing but it's only OBDII check. So when I had long tubes, no cats, and dumped duals I had it tuned so there were no codes. Even so, my friend said he couldn't inspect it at work because if somebody else saw that it had no cats and that the exhaust didn't exit the rear of the car, he could get in trouble. So I had to take it to a guy who did it after hours, off the books. He still had to hook it up to the computer and send the results in to the state, but that didn't matter because it was all tuned.

So in your case if you don't know anyone who will "help you out", then you might need cats AND a system that isn't dumped. In fact, if the shop you take it to would happen to be ******, they still might not pass it just because of the long tubes, which are technically illegal in all 50 states because of the *****....I mean EPA laws. Probably best to talk to local gear heads to see what you can get away with, and maybe get a "referral" to a good inspection station.
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Old Jun 24, 2012 | 07:16 AM
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^^^ Dirty smog is easy to find. Alot of Performane shops know ppl to hook u up... It will cost you tho.
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Old Jun 24, 2012 | 12:06 PM
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Old Jun 24, 2012 | 12:30 PM
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It's funny... But sometimes I think of adding cats to my car just because I had deviated septum surgey.... I can smell like a dog now and the smell gets to me when the T-tops are out...
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Old Jun 24, 2012 | 06:09 PM
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Originally Posted by 2win_SS
^^^ Dirty smog is easy to find. Alot of Performane shops know ppl to hook u up... It will cost you tho.
In my case it was cheaper. $50 total for inspection and emissions. Cheaper than having it done legit.
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Old Jun 24, 2012 | 08:07 PM
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Originally Posted by X-ray
In my case it was cheaper. $50 total for inspection and emissions. Cheaper than having it done legit.
^^^ is that smog and test only? Or just smog? Good price. Here in CA $150 is usual. $50 less would be awesome
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