[jmh600cbr]

Originally Posted by Medal

Sounds great bro! I don't understand primary resonator, though; my understanding is the primary cats are on the downpipes, then through sequential resonators, then secondary cats, before hitting the stock muffler.

In my case, I removed both resonators and replaced with straight pipe; that's it. So just confused on what's different between our two solutions.

Any input is appreciate and again, yours sounds killer!

As mentioned in my post the resonators effect the depth of the sound while the secondary cat is volume. My understanding is that removing the secondary res creates a droning sound.

[Medal]

[QUOTE/

As mentioned in my post the resonators effect the depth of the sound while the secondary cat is volume. My understanding is that removing the secondary res creates a droning sound.[/QUOTE]

I understand but I most definitely have zero drone. I can't stand drone and it annoys me when I hear it from other cars so 🤷

[jmh600cbr]

Originally Posted by Medal

[QUOTE/

As mentioned in my post the resonators effect the depth of the sound while the secondary cat is volume. My understanding is that removing the secondary res creates a droning sound.

I understand but I most definitely have zero drone. I can't stand drone and it annoys me when I hear it from other cars so 🤷[/QUOTE]

No clue. I'm not an expert but as long as we're all happy who cares?

[Medal]

Originally Posted by jmh600cbr

No clue. I'm not an expert but as long as we're all happy who cares?

Absolutely, I'm just trying to understand your set up is all…sounds killer and wondering if I should add X pipe somewhere vs. just the dual res delete I have now with replacement straight pipes.

[TrentMeister]

Originally Posted by Medal

[QUOTE/

As mentioned in my post the resonators effect the depth of the sound while the secondary cat is volume. My understanding is that removing the secondary res creates a droning sound.

No drone unless you wire your valves open

[abrush32]

Originally Posted by TrentMeister

No drone unless you wire your valves open

For what it's worth I haven't experienced any drone with both resonators out and valves wired open.

[TrentMeister]

Originally Posted by abrush32

For what it's worth I haven't experienced any drone with both resonators out and valves wired open.

Yeah that was fine for me too, after I did the secondary cats it was not ok anymore

[Medal]

Originally Posted by abrush32

For what it's worth I haven't experienced any drone with both resonators out and valves wired open.

Ditto…just dual res delete and straight pipe…that's what I was trying to understand with that other guy….as his sounds killer and just wondering if I should replace the straight pipes with an x pipe, but from what I'm reading, it wouldn't make that big a difference.

[m20e3087]

Parts are in for the mod. They are 3" 304SS and USA made. Will install in 2 weeks.

[G80SWFL]

Originally Posted by m20e3087

Parts are in for the mod. They are 3" 304SS and USA made. Will install in 2 weeks.

Let us know!

[Celestion]

Originally Posted by mattburks

I’ve been running dual res, x pipe in place of second res, and 2nd cat delete for months. Wouldn’t have it any other way— I owe vids. I bantered months ago, but did anyone ever post? If not I owe as it sounds great! I paid $350 at a reputable DFW muffler @ custom fab’d shop. This mid pipe prices are highway robbery

Would love to know which shop, as I am also in the DFW area.

[Celestion]

Originally Posted by Medal

Forgot to add pic of removed section of exhaust with resonators...apologies

That SVS subwoofer box looks unopened. Happy to take it off your hands if needed. Just let me know

[Medal]

Originally Posted by Celestion

That SVS subwoofer box looks unopened. Happy to take it off your hands if needed. Just let me know

Nope, they were opened and I actually gotta throw them out now that you mention it! I have two SVS SB-3000 subs in my home theater set up, and I saved the boxes for them, as you can trade them back and get full paid price credit back for them towards an upgrade…to like the 4000 or Ultra series…but you only have one year, and that was back in May for me so I have no reason to hang on to those boxes any longer.

[spridge]

Originally Posted by Medal

Absolutely, I'm just trying to understand your set up is all…sounds killer and wondering if I should add X pipe somewhere vs. just the dual res delete I have now with replacement straight pipes.

Confirming for everyone that the existing resonators do not have an X pipe inside either of them. Verified with borescope after removing them from my G80 today.

[Johnathanz32]

^^^ thank you I've been wondering about that.

[TrentMeister]

Originally Posted by spridge

Confirming for everyone that the existing resonators do not have an X pipe inside either of them. Verified with borescope after removing them from my G80 today.

It's very clearly an x tho you can see with the naked eye

[spridge]

Originally Posted by TrentMeister

It's very clearly an x tho you can see with the naked eye

There is set of open holes in the pipes as they pass through one of the resonators that could be described as an H pipe. Definitely not crossing

[TrentMeister]

Originally Posted by spridge

There is set of open holes in the pipes as they pass through one of the resonators that could be described as an H pipe. Definitely not crossing

I guess it would be best described as resonance chamber.

It does in fact localize the exhaust pulses. Not a true x though you are correct.

[mattburks]

Originally Posted by Celestion

Would love to know which shop, as I am also in the DFW area.

Sorry for delay Celestion
I used miller muffler in Lewisville. I like them because they’re cheap, clean welds & don’t ask questions about me pulling the secondaries.

Otherwise all other work thus far has been performed at Cedar Performance Downtown Dallas/cedars/ deep ellum area. They do do g the same for you there as well, but it’ll run considerably more than the sub 400 amount I paid for dual res, replace with X and cut secondaries.

On a different note- after adding my JB4, I SWEAR my car is just slightly audibly a touch more tame post piggy back… placebo or it cleaned up some of the trims is all I can think of.

[KevinGS]

My car always starts in efficient mode, with the exhaust button light "on". Can I change this? Can you control if the car starts with the exhaust open or closed?

[mattburks]

Originally Posted by KevinGS

My car always starts in efficient mode, with the exhaust button light "on". Can I change this? Can you control if the car starts with the exhaust open or closed?

Only solution is to change the input of your driver mode prior to start. Sport plus and cold start for a treat if you haven’t done this prior.

Sure wish there was a way to have it auto return to your previous input. I imagine this is 100% EPA related.
Interested to see if Bootmod or a flash will provide option in the future.

[KevinGS]

Originally Posted by mattburks

Only solution is to change the input of your driver mode prior to start. Sport plus and cold start for a treat if you haven’t done this prior.

Sure wish there was a way to have it auto return to your previous input. I imagine this is 100% EPA related.
Interested to see if Bootmod or a flash will provide option in the future.

Oh got it, you mean simply turn the car on (accessories)...put it in Sport Plus, and THEN start the car as the valves will be open. Got it. Thanks!