L99 Stock H Pipe vs Aftermarket H pipe

[tekteq]

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!

[shiznight]

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

[tekteq]

Originally Posted by shiznight

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!

[axis]

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.

[ARES5]

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.

[tekteq]

Originally Posted by ARES5

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?

[axis]

Originally Posted by tekteq

Does the L99 also have skipshift?

Yes it does. Put it in "M" and upshift to 2nd before you start.

[Rogan]

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.

[alanhurst]

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.

[tekteq]

Originally Posted by Rogan

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.

[Rogan]

Looks like H is the way to go for my needs. Thanks

[Rogan]

x pipe with different mufflers for those interested.

goto 1:09

[Pace]

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)!

[Rogan]

Originally Posted by Pace

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.