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Old 05-08-2012, 02:46 AM   #18
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Well if it were me, id take it one thing at a time. I'd try the x pipe and see how u like it then. If u want just a little louder, you could delete the mufflers and straight pipe or put some glass packs. If u want something more, then u could start looking into deleting the resonators.
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Old 05-08-2012, 03:01 AM   #19
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yeah i thought taking out the cats would make me happy but terribly wrong. but yeah i want a nice deep tone. so ima go with wut u suggested. add resonated x or the magna flow resonated plus the magnaflow mufflers.. might as well get that all together so i dont pay later to weld and cut allover again . i would be happy though if i can just get an axle back .but im not sure if itll stop the raspy sound
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Old 05-15-2012, 12:03 PM   #20
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yeah i thought taking out the cats would make me happy but terribly wrong. but yeah i want a nice deep tone. so ima go with wut u suggested. add resonated x or the magna flow resonated plus the magnaflow mufflers.. might as well get that all together so i dont pay later to weld and cut allover again . i would be happy though if i can just get an axle back .but im not sure if itll stop the raspy sound

post a vid if you can!! id love to hear
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Old 05-15-2012, 01:51 PM   #21
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post a vid if you can!! id love to hear
I will as soon as i get all the parts. magnaflow tips coming in today. i got the mufflers and im still waitn for the res.magnaflow x pipe. hoping itll all be here by thursday for install
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Old 05-15-2012, 02:19 PM   #22
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The actual cats are the only thing in my exhaust that's still stock because I didn't want to have to deal with them yet. I removed the back cats (the ones AFTER the o2 sensor) and everything is 2.5" all the way through the exhaust and I think it sounds great, but not that loud. Since that's what I was going for, I was happy with it. I'd be interested in hearing how yours sounds after you're done!
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Old 05-16-2012, 03:00 AM   #23
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oh nice thats what im goin for. yeah hopefully ill get it soon. do u hav any vids?
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Old 05-16-2012, 04:23 PM   #24
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Removing cats will definitely make the car louder and raspier, the easiest thing to do to get rid of it is to put helmholtz chambers on.
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Old 05-17-2012, 03:01 AM   #25
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defently raspy. im hoping the x resonator will make due . does it restrict alot of air flow?
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Old 05-26-2012, 12:49 PM   #26
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Well there are four NUTS (so even after soaking them with PB we're gonna break those rusty studs lol) and then the cat unbolts from the head. Then obviously disconnect O2's and the whole thing drops out. (Only a muffler clamp connects it to the rest of the exhaust.)
I pulled the nuts off mine the 1st week I got it home and put anti seize on them. I knew at some point they would be coming off to change something.
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Old 05-27-2012, 12:46 PM   #27
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what you change it to?? hi flow?
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Old 09-06-2012, 01:06 AM   #28
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Just wanted to verify before I do this mod. If I remove both front and rear cats, I will get a CEL and need tune to fix it? If I remove just the rear cats, I will not get a CEL? If I replace the front cats with 200 cell (or lower) cats, will I get a CEL?
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Old 09-06-2012, 10:19 AM   #29
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If you remove rear cats you will not get a CEL


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Old 09-28-2013, 07:19 PM   #30
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Enjoyed reading through this thread, I just picked up the solo hfc used from a forum member. How much additional HP do you think a cat delete would gain over the hfc?
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Old 11-08-2013, 02:23 PM   #31
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Any vids of the cat delete on the LFX?
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Old 11-09-2013, 09:52 PM   #32
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I could be wrong but I thought the LFX only had two cats before the o2 sensors. The way I saw it is a pipe from the head, a cat, then a resonator, the H connector, another resonator before the rear axle and then the mufflers. Can anyone verify if these cars have a total of two cats or four?
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Old 11-10-2013, 01:50 PM   #33
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Quote:
Originally Posted by V6 LS Supercar View Post
I could be wrong but I thought the LFX only had two cats before the o2 sensors. The way I saw it is a pipe from the head, a cat, then a resonator, the H connector, another resonator before the rear axle and then the mufflers. Can anyone verify if these cars have a total of two cats or four?
They have a total of four. Two big ones and two smaller ones.
So it's:
Big cat > O2 sensor > little cat > H-pipe > resonator > muffler

Here's a pic of the smaller one.
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Old 11-11-2013, 12:45 AM   #34
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Ahh it sounds like I need to ditch the back two after o2 sensor
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