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      05-13-2021, 11:26 PM   #45
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Quote:
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Originally Posted by warcity View Post
Back with an update:

Primary res was deleted few weeks back 5% sound increase.

Secondary cat was deleted today. Much better. 30% sound increase. No droning. Sounds good.
Any CEL with deleting the secondary cat?
None at all. All good and normal. I must add that the added sound is only noticeable in sport and spot plus. Comfort mode is quiet as a mouse.
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      05-14-2021, 01:37 AM   #46
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      05-27-2021, 09:00 PM   #47
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Update on first post.
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      05-27-2021, 09:30 PM   #48
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Quote:
Originally Posted by warcity View Post
Quote:
Originally Posted by Ghozthunter View Post
Quote:
Originally Posted by warcity View Post
Back with an update:

Primary res was deleted few weeks back 5% sound increase.

Secondary cat was deleted today. Much better. 30% sound increase. No droning. Sounds good.
Any CEL with deleting the secondary cat?
None at all. All good and normal. I must add that the added sound is only noticeable in sport and spot plus. Comfort mode is quiet as a mouse.
So far so good. No regrets. Sounds great.
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      05-27-2021, 09:47 PM   #49
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Quote:
Originally Posted by warcity View Post
Quote:
Originally Posted by Ghozthunter View Post
Quote:
Originally Posted by warcity View Post
Back with an update:

Primary res was deleted few weeks back 5% sound increase.

Secondary cat was deleted today. Much better. 30% sound increase. No droning. Sounds good.
Any CEL with deleting the secondary cat?
None at all. All good and normal. I must add that the added sound is only noticeable in sport and spot plus. Comfort mode is quiet as a mouse.
That's interesting to hear. I drive with the engine in Sport+ by default, but cruising on the freeway I'll often go back to comfort, close the pipes, and turn off the sport HUD. Being able to cruise with not a lot of noise is pleasant, but being able to liven it up when I get off is great. If I can add noise when I want it but not get a headache on the freeway I'm sold
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      05-27-2021, 10:51 PM   #50
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Quote:
Originally Posted by Pantagathus View Post
Quote:
Originally Posted by warcity View Post
Quote:
Originally Posted by Ghozthunter View Post
Quote:
Originally Posted by warcity View Post
Back with an update:

Primary res was deleted few weeks back 5% sound increase.

Secondary cat was deleted today. Much better. 30% sound increase. No droning. Sounds good.
Any CEL with deleting the secondary cat?
None at all. All good and normal. I must add that the added sound is only noticeable in sport and spot plus. Comfort mode is quiet as a mouse.
That's interesting to hear. I drive with the engine in Sport+ by default, but cruising on the freeway I'll often go back to comfort, close the pipes, and turn off the sport HUD. Being able to cruise with not a lot of noise is pleasant, but being able to liven it up when I get off is great. If I can add noise when I want it but not get a headache on the freeway I'm sold
That's what you will get. In comfort mode exhaust is barely audible.
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      05-28-2021, 10:52 AM   #51
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LBbluem2

How much was the X-Pipe? Do you think its necessary to get once both res are removed?
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      05-28-2021, 01:36 PM   #52
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LBbluem2

How much was the X-Pipe? Do you think its necessary to get once both res are removed?
Yeah definitely mandatory to get the x.

One of the resonators has an x built in and it's the only spot the pulses merge.

I paid 200$ out the door.

It sounds REALLY good
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      05-28-2021, 01:51 PM   #53
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Quote:
Originally Posted by LBbluem2 View Post
Yeah definitely mandatory to get the x.

One of the resonators has an x built in and it's the only spot the pulses merge.

I paid 200$ out the door.

It sounds REALLY good
So they can just use that x or they have to install a different one? I am a complete noob on exhaust stuff. I was quoted $350 for the removal of both resonators and I am wondering if he's already figured in the xpipe or not. $200 is a great deal. Not many reliable shops close to me so not much competition. Beats that other guy who paid $600 though haha.
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      05-28-2021, 02:07 PM   #54
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Quote:
Originally Posted by Der_Wolf View Post
So they can just use that x or they have to install a different one? I am a complete noob on exhaust stuff. I was quoted $350 for the removal of both resonators and I am wondering if he's already figured in the xpipe or not. $200 is a great deal. Not many reliable shops close to me so not much competition. Beats that other guy who paid $600 though haha.
If I had to guess, I'd say the X pipe was inside the res and that means you'd have to probably make a new one. I would definitely ask the shop sooner rather then later so you can be out the door with that sick sounding setup.
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      05-28-2021, 02:55 PM   #55
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Quote:
Originally Posted by Der_Wolf View Post
Quote:
Originally Posted by LBbluem2 View Post
Yeah definitely mandatory to get the x.

One of the resonators has an x built in and it's the only spot the pulses merge.

I paid 200$ out the door.

It sounds REALLY good
So they can just use that x or they have to install a different one? I am a complete noob on exhaust stuff. I was quoted $350 for the removal of both resonators and I am wondering if he's already figured in the xpipe or not. $200 is a great deal. Not many reliable shops close to me so not much competition. Beats that other guy who paid $600 though haha.
No the x is built into the resonator.

So they'll cut out the whole section and just install what amounts to a 2.5 foot xpipe.

I was really surprised when he told me 200, I had seen your quote of 350 and I was prepared to pay about that.

600 is pure lunacy.

If you're in Orange County my Guy is

"south coast muffler hitch"

I think this is the only exhaust mod 90% of us will need
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      05-28-2021, 05:51 PM   #56
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Quote:
Originally Posted by LBbluem2 View Post
No the x is built into the resonator.

So they'll cut out the whole section and just install what amounts to a 2.5 foot xpipe.

I was really surprised when he told me 200, I had seen your quote of 350 and I was prepared to pay about that.

600 is pure lunacy.

If you're in Orange County my Guy is

"south coast muffler hitch"

I think this is the only exhaust mod 90% of us will need


Thoughts on secondary cat? You left in-tact, but would this be "over the top?"

Yours sounds epic - thank you so much for sharing! I will be doing mine after getting back from PPF & ceramic coat tomorrow!
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      05-28-2021, 07:20 PM   #57
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Quote:
Originally Posted by mattburks View Post
Quote:
Originally Posted by LBbluem2 View Post
No the x is built into the resonator.

So they'll cut out the whole section and just install what amounts to a 2.5 foot xpipe.

I was really surprised when he told me 200, I had seen your quote of 350 and I was prepared to pay about that.

600 is pure lunacy.

If you're in Orange County my Guy is

"south coast muffler hitch"

I think this is the only exhaust mod 90% of us will need


Thoughts on secondary cat? You left in-tact, but would this be "over the top?"

Yours sounds epic - thank you so much for sharing! I will be doing mine after getting back from PPF & ceramic coat tomorrow!
Pulling the secondaries would definitely make a bigger volume difference and bring out a lot of aggression

Right now my condo is in a pretty tight community and I'm positive it would be obnoxious (to everyone but me) on cold start.

Kind of like my m2c with aa single mid was

But

If I were to get them out:

1-It would be a tiny bit difficult to get the cat delete pipes fabricated so definitely a more expensive endeavor

2-I'd leave the 1 resonator that houses the x and let that one sort out any possible rasp

3-In California it would be kind of difficult finding a shop willing to do it, even the guys I have a relationship with didn't even want to discuss it.

Long story short, I would definitely do it if I lived in a less dense neighborhood.

But I am currently VERY happy with the way it now sounds👍🏼👍🏼
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      05-28-2021, 07:35 PM   #58
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Today while getting to know my car a little better:

I did a pull in 3rd and let out up near 6k and it throws down some pretty serious pops and bangs.

Definitely a much shorter duration than my m2c had but every bit as aggressive.

Not as sharp as s55 burbles but boomier if that makes sense.
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      05-28-2021, 08:46 PM   #59
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Quote:
Originally Posted by LBbluem2 View Post
Today while getting to know my car a little better:

I did a pull in 3rd and let out up near 6k and it throws down some pretty serious pops and bangs.

Definitely a much shorter duration than my m2c had but every bit as aggressive.

Not as sharp as s55 burbles but boomier if that makes sense.
I need to do this bro
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      05-29-2021, 05:08 AM   #60
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Great thread! So my takeaways are: secondary cat delete (right after downpipe flanges) biggest bang for buck in volume. First resonator (closest to engine) is straight through piping with baffles and expansion chamber, little volume benefit removing. Second resonator (furthest from engine) is more complex and is where cylinder bank mixing occurs (are we 100% on this, anyone have pics?). If these takeaways are correct, i would defo do secondary cat delete since they are unmonitored (did this on my aston with the amg ttv8, results were legendary) and the first resonaotor. My experience with secondary cat deletes has been really really good. I would expect zero point zero drone with secondary cat n first resonator delete on the G8x
This plus charcoal filter removal and bmc could be the move...
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      05-29-2021, 05:35 AM   #61
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Anyone know any competent exhaust shops in the New York / Brooklyn / Queens area who would you would trust to do a nice job on this?
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      05-29-2021, 07:22 AM   #62
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Quote:
Originally Posted by PLife View Post
Great thread! So my takeaways are: secondary cat delete (right after downpipe flanges) biggest bang for buck in volume. First resonator (closest to engine) is straight through piping with baffles and expansion chamber, little volume benefit removing. Second resonator (furthest from engine) is more complex and is where cylinder bank mixing occurs (are we 100% on this, anyone have pics?). If these takeaways are correct, i would defo do secondary cat delete since they are unmonitored (did this on my aston with the amg ttv8, results were legendary) and the first resonaotor. My experience with secondary cat deletes has been really really good. I would expect zero point zero drone with secondary cat n first resonator delete on the G8x
This plus charcoal filter removal and bmc could be the move...
I think this is the ticket!
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      05-29-2021, 08:08 AM   #63
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Quote:
Originally Posted by G80GM View Post
Quote:
Originally Posted by barryc365 View Post
Anyone know any competent exhaust shops in the New York / Brooklyn / Queens area who would you would trust to do a nice job on this?
Needpowdercoating in Newark New Jersey did mine great job clean check out there Instagram
That's awesome, how much did that run you?
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      05-29-2021, 08:44 AM   #64
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Quote:
Originally Posted by warcity View Post
So far so good. No regrets. Sounds great.
warcity

Im going your route this afternoon- do you have any pictures by chance or specific details on what they did on your secondary cat delete? Did they just do 3” piping they sourced? The word cat is making me a little nervous.
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      05-29-2021, 10:04 AM   #65
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Quote:
Originally Posted by PLife View Post
Great thread! So my takeaways are: secondary cat delete (right after downpipe flanges) biggest bang for buck in volume. First resonator (closest to engine) is straight through piping with baffles and expansion chamber, little volume benefit removing. Second resonator (furthest from engine) is more complex and is where cylinder bank mixing occurs (are we 100% on this, anyone have pics?). If these takeaways are correct, i would defo do secondary cat delete since they are unmonitored (did this on my aston with the amg ttv8, results were legendary) and the first resonaotor. My experience with secondary cat deletes has been really really good. I would expect zero point zero drone with secondary cat n first resonator delete on the G8x
This plus charcoal filter removal and bmc could be the move...
I'll have to double check the resonators when I get home but I do believe you are correct
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      05-29-2021, 12:40 PM   #66
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Quote:
Originally Posted by LBbluem2 View Post
I'll have to double check the resonators when I get home but I do believe you are correct
LBbluem2
If you don't mind 100% confirming when handy... I'll owe you 2 beers now.
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