Going from MBRP Race to Street Catback

Bull Run said:

I'm having Vibrant Ultra Quiet resonator put on next week as my current setup has lots of drone between 1K to low-2K RPM. Will share the experience here once installed.

For the OP, here's a good article on Mufflers vs. Resonators.

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WileECoyote79 said:

I had the MBRP Race catback installed in about 3 weeks ago and have put about 650 miles on it since. I have to say i love the note when driving around town but hate it when im on the freeway . I would say anything above 1800 rpm is when i notice it the most. I have the ford performance tune so at about 2000 rpm im at about 65 mph. I have disconnected the active noise control sensors and even put in a sound deadening mat in the trunk. I know alot of people say they dont hear it on the freeway but i do.

Im thinking about swapping out the MBRP race for the street. For people who have done this did it make a difference when cruising at highway speeds or is the main difference at lower speeds?

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WileECoyote79 said:

Please do I would really appreciate it. The biggest thing I can't wrap my head around is how the resonator fits between the downtube and the Y tube. from the schematic i have it looks like there are two many bends for the resonator to fit. My plan might be to buy the Vibrant Ultra Quiet and hand it to one of the mechanics i trust and say make it fit. If i do i plan to ask them to take pics or ill hang around and take it myself. For the future generation LOL.:headbonk:

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VinnAY said:

Just because the car is running and going down the road does not mean that you're in the correct gear for that situation. Downshift one gear and get out of that RPM range. Most everyone of you the complains about drone has a problem selecting the the right gear and RPM for the situation. You should never be in a gear that has you cruising in that RPM range. I never grab 6th unless I'm over 70mph but I know you're in 6th by the RPM ranges...wrong gear for you to be in.

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WileECoyote79 said:

Please do I would really appreciate it. The biggest thing I can't wrap my head around is how the resonator fits between the downtube and the Y tube. from the schematic i have it looks like there are two many bends for the resonator to fit. My plan might be to buy the Vibrant Ultra Quiet and hand it to one of the mechanics i trust and say make it fit. If i do i plan to ask them to take pics or ill hang around and take it myself. For the future generation LOL.:headbonk:

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Bull Run said:

Attached is the picture as promised. The Magnaflow muffler I'm using has a single 3" inlet and dual 2.5" outlets, so it's also acting as a Y pipe.

It made a noticeable reduction in drone, so I'd say it's worth about 4 lbs in net weight gain. While some drone remains, it's on par with the differential noise from the aluminum diff busing inserts, so I'm good with it.

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MakStang said:

A friend of mine used the setup I described above (MBRP race + Ultra Quiet Vibrant resonator). The photos below show how the resonator was installed between the Y-pipe and the downpipe. Hope this helps ;)

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MakStang said:

He still gets some drone. But it’s not that terrible.

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MakStang said:

@Manu_kaps I suppose so. Why don’t you try it? You can add the y-pipe later if you want.

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Bull Run said:

Attached is the picture as promised. The Magnaflow muffler I'm using has a single 3" inlet and dual 2.5" outlets, so it's also acting as a Y pipe.

It made a noticeable reduction in drone, so I'd say it's worth about 4 lbs in net weight gain. While some drone remains, it's on par with the differential noise from the aluminum diff busing inserts, so I'm good with it.

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zsameer said:

My biggest issue is at certain rpms it creates a rattle in the doors i guess due to the resonance frequencies. Did adding the resonator fix that issue for you if you had that before?

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zsameer said:

My biggest issue is at certain rpms it creates a rattle in the doors i guess due to the resonance frequencies. Did adding the resonator fix that issue for you if you had that before?

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BigBootyJudy said:

I put the MBRP street catback along with their 3" catless DP on my 2018 EB 3 days ago and I can assure you that there's a lot more cabin noise and drone when cruising around town. At freeway speeds it's hardly noticeable and you don't know there's an aftermarket exhaust on the car until you open it up, and then it starts making some glorious exhaust notes and tone. I've ordered a Vibrant Ultra Quiet resonator and I'm going to have it welded in next week. I hope this cures the cabin drone. Otherwise I'm going to rethink my exhaust options.

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