[jct_m3]

Wow….. just read all 26 pages

My car finally got into production- i'll probably see it end of march. I'm gonna go with secondary cat and first resonator delete and Leave the second resonator in. i'll probably do it after the break in service not sure to be honest.

Here's a video that shows everything… The cuts the under carriage. Sound and drive bys. He did secondary cat and first resonator delete.

Not sure if that link will post but if not look up
"jiggle foot racing". he has a video titled exhaust mod.

[TrentMeister]

Originally Posted by aj_g80

is cutting out both resonaters loud enough to be ignorant and loud when valves are open, but quiet enough where you can daily drive it when valves are closed

Cut it all out and it's ignant and loud and super tame in efficient.

Dual res delete was nice but left me personally wanting more.

[ChrisM4]

Originally Posted by jct_m340

Wow….. just read all 26 pages

My car finally got into production- i'll probably see it end of march. I'm gonna go with secondary cat and first resonator delete and Leave the second resonator in. i'll probably do it after the break in service not sure to be honest.

Here's a video that shows everything… The cuts the under carriage. Sound and drive bys. He did secondary cat and first resonator delete.

Not sure if that link will post but if not look up
"jiggle foot racing". he has a video titled exhaust mod.

They did a great job on his setup. For me I'd probably just remove the secondary cats and keep both resonators. Will add power and overall volume but still be really smooth sounding.

[DMW2315]

Can somebody post a video of a Cold Start with both resonator delete and valves open (with stock cats)?

After I delete both resonators, I was going to mod the valves permanently open but need to see if it will be too loud in the AM. If it's too loud, I'll leave the valves alone and start the car with valves closed in the AM and open when I get off my street lol

[TrentMeister]

Originally Posted by DMW2315

Can somebody post a video of a Cold Start with both resonator delete and valves open (with stock cats)?

After I delete both resonators, I was going to mod the valves permanently open but need to see if it will be too loud in the AM. If it's too loud, I'll leave the valves alone and start the car with valves closed in the AM and open when I get off my street lol

The 1st YouTube link on the very first post👍🏼

[Grumpy514]

Anyone have any videos comparing the Equal length mid pipe to single pipe or just regular mid pipes (not equal length) ?

I've heard some say the single is less raspy than the standard mid pipe but looking at F80 videos (some say it's similar to how they sound when you change the mid pipe layout) the EL sound less raspy?

[mike@x-ph.com]

Originally Posted by Grumpy514

Anyone have any videos comparing the Equal length mid pipe to single pipe or just regular mid pipes (not equal length) ?

I've heard some say the single is less raspy than the standard mid pipe but looking at F80 videos (some say it's similar to how they sound when you change the mid pipe layout) the EL sound less raspy?

the single midpipe is not as loud as the x-pipe but it's less raspy with a deeper midrange tone.

The X-pipe is an equal length for the G8x

[DMW2315]

Originally Posted by TrentMeister

The 1st YouTube link on the very first post����

Thanks. Saw that video but wasn't sure since the title said "82 M4 resonator deletion+xpipe warm start".

To me, a Warm start means the car was warmed up already and had bypassed cold start.

Also that video has the xpipe installed so wasn't sure if that was any different in volume than straight piped for the resonator deletes.

[TrentMeister]

Originally Posted by DMW2315

Thanks. Saw that video but wasn't sure since the title said "82 M4 resonator deletion+xpipe warm start".

To me, a Warm start means the car was warmed up already and had bypassed cold start.

Also that video has the xpipe installed so wasn't sure if that was any different in volume than straight piped for the resonator deletes.

Yeah that was a "warm start" I'd been driving for a few hours… but it seems like no matter what in my car I get high idle for a few seconds after startup AND there are many different audio profiles the car has for startup it's almost never the same tbh

Hadn't noticed that I mistitled it.

I kind of doubt there would be a difference in tone for the startup on x vs straight.. but maybe

[GixY2K]

Probably another repetitive question in this thread, but...

After hearing the first video on the first post, I feel as if the video is not doing the true sound justice.

So my questions is, having just installed the PSI mid-pipe that gets rid of the secondary cats and primary and secondary resonator, how much louder would it get if I do the 'fully-opened valve' modification? Reason is, I feel as though those valves are stealing a lot of the thunder away from the sound now that I have an X-Pipe. So wondering if for those that have done both modifications feel is just right, too loud, or still not loud enough.

Note: I just finished reading all the posts on the "Opening Exhaust Flaps Fully" thread (again), and apparently, the consensus is that the valves are never truly open unless you lock them in the open position with a wire. So, I take it that unless you do this mod, the sound will still be diluted to an extent by the valves not being "fully opened".

[TrentMeister]

Originally Posted by GixY2K

Probably another repetitive question in this thread, but...

After hearing the first video on the first post, I feel as if the video is not doing the true sound justice.

So my questions is, having just installed the PSI mid-pipe that gets rid of the secondary cats and primary and secondary resonator, how much louder would it get if I do the 'fully-opened valve' modification? Reason is, I feel as though those valves are stealing a lot of the thunder away from the sound now that I have an X-Pipe. So wondering if for those that have done both modifications feel is just right, too loud, or still not loud enough.

Note: I just finished reading all the posts on the "Opening Exhaust Flaps Fully" thread (again), and apparently, the consensus is that the valves are never truly open unless you lock them in the open position with a wire. So, I take it that unless you do this mod, the sound will still be diluted to an extent by the valves not being "fully opened".

I just bought an external mic, just need to upload some fresh content and I'll post it later today, I did every variation of sound possible

[Steveo]

I read that with Autohold set to off, the revs should settle down.

Originally Posted by TrentMeister

Yeah that was a "warm start" I'd been driving for a few hours… but it seems like no matter what in my car I get high idle for a few seconds after startup AND there are many different audio profiles the car has for startup it's almost never the same tbh

Hadn't noticed that I mistitled it.

I kind of doubt there would be a difference in tone for the startup on x vs straight.. but maybe

[Steveo]

Correct, with valves wired open it is much better and are fully open compared to standard.

Originally Posted by GixY2K

Probably another repetitive question in this thread, but...

After hearing the first video on the first post, I feel as if the video is not doing the true sound justice.

So my questions is, having just installed the PSI mid-pipe that gets rid of the secondary cats and primary and secondary resonator, how much louder would it get if I do the 'fully-opened valve' modification? Reason is, I feel as though those valves are stealing a lot of the thunder away from the sound now that I have an X-Pipe. So wondering if for those that have done both modifications feel is just right, too loud, or still not loud enough.

Note: I just finished reading all the posts on the "Opening Exhaust Flaps Fully" thread (again), and apparently, the consensus is that the valves are never truly open unless you lock them in the open position with a wire. So, I take it that unless you do this mod, the sound will still be diluted to an extent by the valves not being "fully opened".

[RugbyBro]

Originally Posted by GixY2K

Note: I just finished reading all the posts on the "Opening Exhaust Flaps Fully" thread (again), and apparently, the consensus is that the valves are never truly open unless you lock them in the open position with a wire. So, I take it that unless you do this mod, the sound will still be diluted to an extent by the valves not being "fully opened".

Correct - been this way since F8X. One thing you should consider is that G8X is even more sound insulated than F8X, which was already very sound insulated to begin with. Where I'm going with this is that your car is much louder on the outside than what you perceive on the inside. An exhaust chain that has removed the secondary cats and resonators and has a muffler bypass option (open valves) is really quite loud on heavy throttle... loud enough to piss people off even though it may not seem like it from the drivers seat.

Also the valves are programmed in all modes to close under certain conditions like high gear, low rev situations to cut out drone - if you force them open, you'll experience that drone.

[barryc365]

Originally Posted by RugbyBro

Correct - been this way since F8X. One thing you should consider is that G8X is even more sound insulated than F8X, which was already very sound insulated to begin with. Where I'm going with this is that your car is much louder on the outside than what you perceive on the inside. An exhaust chain that has removed the secondary cats and resonators and has a muffler bypass option (open valves) is really quite loud on heavy throttle... loud enough to piss people off even though it may not seem like it from the drivers seat.

Also the valves are programmed in all modes to close under certain conditions like high gear, low rev situations to cut out drone - if you force them open, you'll experience that drone.

I can confirm this. My car with the Valvetronic turns heads under half throttle. People are not impressed or anything but they look up to see what the noise is.

The car seems quiet to me with the windows up but with the windows down there is a lot of noise and over run

A few times I've blipped the throttle in neutral instead of reverse accidentally and it makes a lot of noise, again enough for people to look over.

Over all for me, I think it's the perfect balance especially with the quiet button on the valves, I flip that on when I need to be discreet

[dimab0]

I recently did buy and get installed the M Performance Exhaust, whether or not people agree with that. I'm honestly still looking for something more....and think I would like to get rid of at least the first resonator (the front one, the one that is not combining the two pipes).

Is the midpipe titanium? If removing the resonator and welding straight pipes in place of it, I am concerned the weld may not be good if not done correctly. Anyone heard concerns about this? Thank you!

[TrentMeister]

Originally Posted by dimab0

I recently did buy and get installed the M Performance Exhaust, whether or not people agree with that. I'm honestly still looking for something more....and think I would like to get rid of at least the first resonator (the front one, the one that is not combining the two pipes).

Is the midpipe titanium? If removing the resonator and welding straight pipes in place of it, I am concerned the weld may not be good if not done correctly. Anyone heard concerns about this? Thank you!

You would definitely be forging a new path.

Did you see the way it was welded currently?

Or is it just clamped?

[dimab0]

Originally Posted by TrentMeister

You would definitely be forging a new path.

Did you see the way it was welded currently?

Or is it just clamped?

To clarify - M Perf Exhaust is installed after the second resonator. I'm not touching how it is connected. My midpipe is basically same as stock.

[TrentMeister]

Originally Posted by dimab0

To clarify - M Perf Exhaust is installed after the second resonator. I'm not touching how it is connected. My midpipe is basically same as stock.

Right but I'm just curious how it's connected to the existing midpipe(stainless btw)

I imagine it has to be clamps.

You should be fine cutting out the forward resonator and putting straight pipes in place.

You'll be happy with it I bet.

Maybe even get your hands on a Vsc2 valve controller.

[dimab0]

Originally Posted by TrentMeister

Right but I'm just curious how it's connected to the existing midpipe(stainless btw)

I imagine it has to be clamps.

You should be fine cutting out the forward resonator and putting straight pipes in place.

You'll be happy with it I bet.

Maybe even get your hands on a Vsc2 valve controller.

Thank you. Thought it was titanium. I'll find someone in Chicago that may be able to do it. Thanks again!

[FISH22]

Originally Posted by dimab0

I recently did buy and get installed the M Performance Exhaust, whether or not people agree with that. I'm honestly still looking for something more....and think I would like to get rid of at least the first resonator (the front one, the one that is not combining the two pipes).

Is the midpipe titanium? If removing the resonator and welding straight pipes in place of it, I am concerned the weld may not be good if not done correctly. Anyone heard concerns about this? Thank you!

I'm hoping to install my MPE this weekend. My G80 already has a PSI mid pipe, so I can give you an idea of what it'll sound like with no resonators or secondary cats.

[dimab0]

Originally Posted by FISH22

I'm hoping to install my MPE this weekend. My G80 already has a PSI mid pipe, so I can give you an idea of what it'll sound like with no resonators or secondary cats.

Also, the OEM mid pipe, and majority of aftermarket ones are steel.

Thanks. Would love to see that. You like the psi midpipe?