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Old 01-12-2012, 05:54 PM   #1
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Pros and cons

Hey guys,
I wanted to get the pros and cons on running LT headers with and without high flow cats. I live in SC were we dont have to get inspected so we dont have to pass emissions.
I wanted to get the opinions of the masses on what the differances would be with or without the high flows. I have a 10 LS3 Camaro 6 speed manual. I also want the gains in power and torque but I dont want the car to be over powering when it comes to the exhaust sound. I want a little louder than stock when idling and WOT.
Any help and opinions would be greatly appreciated. Start laying out the differances guys.
Thanks
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Old 01-12-2012, 06:07 PM   #2
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From what I've been told, the high flow cats are so advanced today that the only difference between running cats and not running cats is the exhaust smell.

I opted for no smell and healthier lungs.
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Old 01-12-2012, 06:12 PM   #3
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I guess the next question is for the extra money for the high flows then, is it really worth it to just have the smell reduced a little. Either way, there is going to be a smell. Just less with the high flows
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Old 01-12-2012, 06:29 PM   #4
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I just went from high flows to no cats. You do get more smell, but basically it's like smelling the exhaust from a 60's muscle car. It was a tad louder. Not much at all. As for power difference. I drove the car a mile down the road and back, so I haven't really driven it since the switch over.
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Old 01-12-2012, 06:33 PM   #5
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we don't have inspections here either.all my friends are deleting the cats on their cars,as will i,when i get my LTs.
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Old 01-12-2012, 06:45 PM   #6
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Sounds better without cats in my opion. I don't run them, but if you want to keep it kinda quite then just run a quite muffler. My car is pretty friken loud!
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Old 01-12-2012, 09:43 PM   #7
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If you have thoughts of adding a SC, you should save your $$ on the HFC's. Many of the SC guys are destroying their HFC's with the added exhaust volume and heat. Haven't heard of any NA guys having any problems though. Just something else to consider.
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Old 01-12-2012, 09:51 PM   #8
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Yeah just run without them. If you not have emissions dont worry about it.
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Old 01-12-2012, 10:07 PM   #9
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Quote:
Originally Posted by axis View Post
If you have thoughts of adding a SC, you should save your $$ on the HFC's. Many of the SC guys are destroying their HFC's with the added exhaust volume and heat. Haven't heard of any NA guys having any problems though. Just something else to consider.

What did you just say? HFCs, NA, SC
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Old 01-12-2012, 10:07 PM   #10
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It doesn't make very much differance in the sound with or without them, correct. I guess since I don't have emissions here and the smell will not be that much worse, I will go without the cats to save some money for other mods. Any other advice is welcomed. Thanks for helping everyone
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Old 01-12-2012, 10:24 PM   #11
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Quote:
Originally Posted by Cpanthers85 View Post
From what I've been told, the high flow cats are so advanced today that the only difference between running cats and not running cats is the exhaust smell.

I opted for no smell and healthier lungs.
I'm thinking your lungs will be ok.

It's really not that big a difference.
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Old 01-12-2012, 10:58 PM   #12
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I deleted cats with the LT's and with no tune yet I have noticed no fuel smell.
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Old 01-13-2012, 08:52 AM   #13
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So I guess the view on the forum is that if your state does not require a smog test for inspection then run LT's with no cats at all.
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Old 01-13-2012, 09:11 AM   #14
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No. The view of some in this thread to this point.
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