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Old 05-12-2017, 01:53 PM   #127
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I want to do this but people are saying they lose some low end torque
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Old 05-12-2017, 04:24 PM   #128
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I want to do this but people are saying they lose some low end torque
And it is complete unfounded garbage made up by people who are imagining things.
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Old 05-12-2017, 07:06 PM   #129
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I want to do this but people are saying they lose some low end torque
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Originally Posted by Megahurtz View Post
And it is complete unfounded garbage made up by people who are imagining things.
Exactly. When you think of their function, there is 0 chance it would improve TQ with the 2nd cats installed. Butt dynos frequently lie.
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Old 06-16-2019, 12:45 PM   #130
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Where’s do I buy the kit?
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Old 06-16-2019, 01:59 PM   #131
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I am Interested in buying right and left secondary cats for my Gen6 ZL1. Also need the primary cats too. If anyone had them as a takeoff and would like to sell, please PM me. I need to get a full set for my car.

Thanks and sorry, I don’t mean to hijack this thread.
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Old 09-05-2020, 10:30 PM   #132
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Downshifts are louder especially when the rev match is on the car just sounds all around better with the secondary cats removed. Also when is tour or stealth you cannot even tell that the cats were removed.

So that means that in tour mode, you would not hear the crackle and pops or drone?
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Old 09-05-2020, 10:59 PM   #133
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Hmm. From the sound clips, it sounds like the exhaust pops a lot more often. Maybe I'm hearing things. If that's the case, then this would be a solid no-go.

I also think the same. But maybe there are some aftermarket resonators that could replace the secondary cats and could make the stock NPP exhaust sound stronger, but without the crackle and pops, and no droning.

Is there anybody here who tried this?
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