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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 01-14-2014, 10:18 PM   #1
tekteq
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L99 Stock H Pipe vs Aftermarket H pipe

After some forum browsing I've decided to go with the H pipe over the X pipe for sound and low end torque purposes. I have one last question before I head to the muffler shop, is there a sound or performance difference between the stock L99 giant resonators and an aftermarket H pipe? Thanks!
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Old 01-14-2014, 10:40 PM   #2
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You'll start to hear more exhaust tone. When i had my stock resonator taken off i saw where it was choking the exhaust flow. The car was a bit raspier, but Im still on stock mufflers. The exhaust tone didnt really change until i deleted the cats and went with long tubes. I have videos of my car at wot. But this forums isn't a fan of street contests so i cant post them



Edit: you wont hear a giant difference on h vs x. It will be a qualitative difference that you alone will notice
but unless you pay to do both and listen to which you like better, there isn't a solid answer
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Old 01-14-2014, 10:46 PM   #3
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Quote:
Originally Posted by shiznight View Post
You'll start to hear more exhaust tone. When i had my stock resonator taken off i saw where it was choking the exhaust flow. The car was a bit raspier, but Im still on stock mufflers. The exhaust tone didnt really change until i deleted the cats and went with long tubes. I have videos of my car at wot. But this forums isn't a fan of street contests so i cant post them



Edit: you wont hear a giant difference on h vs x. It will be a qualitative difference that you alone will notice
but unless you pay to do both and listen to which you like better, there isn't a solid answer
My current setup is relatively loud but the more the merrier I've heard that x pipes give more high end tq/hp but lose low end tq/hp plus they sound more modern. I prefer the oldschool muscle tone so I want to go with the H pipes. My only concern is I don't want to lose power!
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Old 01-15-2014, 09:44 PM   #4
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There's not going to be much if any difference in HP/Tq between the two. You just need to have a crossover of some sort in there. The L99 resonator is not only your H pipe but it's also a resonator that quiets the tone a little. A regular X or H pipe, without a resonator, will make the exhaust a little louder, but not much. From what they say, the H pipe gives a little more "old school" sound while the X is a little more exotic. Neither is overwhelmingly different.
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Old 01-16-2014, 02:05 AM   #5
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Your going to hear that AFM kick in and out ALOT more. Thats why the L99 has that huge resonator. To cover the noise of AFM working. The LS3 has tiny resonators since they dont have AFM. Instead they have the Skip Shift to save gas. You'll definatly want a tune after your tired of hearing 4 cyl mode.
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Old 01-16-2014, 02:32 AM   #6
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Your going to hear that AFM kick in and out ALOT more. Thats why the L99 has that huge resonator. To cover the noise of AFM working. The LS3 has tiny resonators since they dont have AFM. Instead they have the Skip Shift to save gas. You'll definatly want a tune after your tired of hearing 4 cyl mode.
I got the Range AFM delete, AFM is no problem for me. Does the L99 also have skipshift?
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Old 01-16-2014, 03:32 AM   #7
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Does the L99 also have skipshift?
Yes it does. Put it in "M" and upshift to 2nd before you start.
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Old 04-24-2014, 08:34 PM   #8
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My resonator or one of them is blown. Did this mod add drone inside? I had that on my old camaro and a little in my old vette... not interested in that, so I'm checking before I make the move.

I have headers and stock exhaust and love hit sounds when daily driving..quiet.
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Old 04-24-2014, 08:53 PM   #9
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I went with an aftermarket H pipe for the same reasons. I did a cat back and dumped the stock resonator and mufflers. If you go to a 3 in exhaust pipe along with diff. mufflers,there is a huge difference in sound,it sounds great and I have never regretted it.
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Old 04-25-2014, 02:14 AM   #10
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Originally Posted by Rogan View Post
My resonator or one of them is blown. Did this mod add drone inside? I had that on my old camaro and a little in my old vette... not interested in that, so I'm checking before I make the move.

I have headers and stock exhaust and love hit sounds when daily driving..quiet.
If quiet is what you are looking for...don't get an x-pipe lol! Ultimately I went with an X-pipe over an H-pipe for my setup and drone is extreme. I used to be able to handle it as sort of sound bonus but now I think I need J-pipes...no noticeable performance gain but it is definitely louder on throttle and idle.
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Old 04-25-2014, 06:29 AM   #11
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Looks like H is the way to go for my needs. Thanks
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Old 04-25-2014, 06:30 AM   #12
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x pipe with different mufflers for those interested.

goto 1:09

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Old 04-25-2014, 09:33 AM   #13
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You should ask Ted @ JRE. If you are tuned by him, he will give you the best advice. He told me to stick with my stock mid pipe and it was the best advice for my taste (L99)!
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Old 04-25-2014, 09:59 AM   #14
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You should ask Ted @ JRE. If you are tuned by him, he will give you the best advice. He told me to stick with my stock mid pipe and it was the best advice for my taste (L99)!
Since I road course the car - I hear it's only a matter of time before the headers screw up a replacement resonator.
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Old 04-25-2014, 10:13 AM   #15
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this is the sound of my non-res X pipe after just installing SOLO high cats - and NO you won't lose power - you gain. (CAI & Doug Thorley short tube headers:
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Old 04-27-2014, 01:52 AM   #16
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Tru x pipe with no mufflers

Deleted the stock resonator and stock mufflers just added tru x pipes and straight 2.5" pipes. That is all lol

And disabled the AFM!!!
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Old 04-27-2014, 02:24 AM   #17
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this is the sound of my non-res X pipe after just installing SOLO high cats - and NO you won't lose power - you gain. (CAI & Doug Thorley short tube headers:
name and maker of your wheels please.
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