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Old 03-11-2020, 04:02 PM #1
twa318 twa318 is offline
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Thoughts on resonator delete?

Ive been considering the resonator delete and exhaust rerouting for a few years now since Iím often riding around with the back window down and whenever I really step on the gas it smells like rotten eggs in the cabin.

Iím nearing old fogie status and really donít want to add any additional loudness or drone to the 4Runner.

For those of you who have done this mod, are you happy with the results? Would you do it again? Do you have any issues with droning on the highway when cruising along with cruise control?
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Old 03-11-2020, 04:24 PM #2
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I relocated mine. Best of both worlds IMHO.

Mine is now before the muffler and after the y-pipe merge. Had a shop weld it basically between the two exhaust hangers.. I did it on a Gibson side exits exhaust and it's quieter than stock now. I did do a 1/4 wave drone-delete, but I'd bet the resonator and stock muffler will probably be fine alone since there's no drone on the factory system.

I will say that while the side exit helps a lot, the biggest help was new cats in the y-pipe. Well, scratch that, the biggest help was removing the worn out cats in the exhaust manifold when I did long tubes. Seems like the rotten egg smell was almost created by the bad cats rather than a result of poor filtration, if that makes sense. I'm running on 2 new cats with LESS smell than the 4 old ones.

Not suggesting you do the same mods, I'm just saying that rerouting will only fix about half of the instances where you notice the smell.

FWIW, I'm a windows down guy, and I don't like loud exhaust at cruising speeds or rotten egg smell. I've got the rear window down anytime it's not pouring rain or way too cold.
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Old 03-11-2020, 04:25 PM #3
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ive researched this and it doesnt change the sound or performance is the consensus.

maybe one instance someone thought it was louder but the majority dont.

when i step up my tools game im going to make the cut. my concern was it affecting MA inspection laws on modified exhaust.
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Old 03-11-2020, 07:38 PM #4
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I cut mine off the first week I owned the truck. Not sure that it did anything different.
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Old 03-11-2020, 11:24 PM #5
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I cut mine off as it kept acting like a plow on the trails. I routed the exhaust out the side and did not notice any sound or performance impact. Glad it's gone. Go for it! Save it and weld it back on for inspection if needed.

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Old 03-13-2020, 11:33 AM #6
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I had a shop remove the resonator and reroute out the side.
I noticed the smallest change in sound. Had a little more meat to it and a slight more drone at around 2k Rpm.

Since then I have added a Flowmaster 50 muffler in which gave the V8 the sound I wanted but also increased the drone quite a bit.
I've learned to live with it and this thing is just getting noisier with every item I had.
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Old 03-14-2020, 05:01 AM #7
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Cut it off and don't look back! I got ride of mine a few years ago and couldn't notice any difference in sound. Routed out the side helped a good deal with the sulfur smell too
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Old 03-14-2020, 11:47 AM #8
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Quote:
Originally Posted by Whytey View Post
I had a shop remove the resonator and reroute out the side.
I noticed the smallest change in sound. Had a little more meat to it and a slight more drone at around 2k Rpm.

Since then I have added a Flowmaster 50 muffler in which gave the V8 the sound I wanted but also increased the drone quite a bit.
I've learned to live with it and this thing is just getting noisier with every item I had.
We have different engines, but I had a similar issue. I wanted a little extra tone to the exhaust but after doing a few things it was just too much and the drone was annoying as hell. I added a Vibrant Ultra Quiet Resonator after the muffler and the drone is gone. Iím honestly amazed at just how much it did tone it down. I have it mounted almost vertically on the backside of the rear axle with a side exit exhaust so itís tucked up and out of the way.

Itís frankly almost too quiet now, but Iíll take that over the drone every time.

So if youíre looking to keep the general tone of your exhaust but want the drone dialed back and general loudness down a notch or two, Iíd highly recommend the ultra quiet resonator.
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Old 03-14-2020, 02:02 PM #9
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Mine got smashed on a camping trip, so I cut it off right where it comes over the axle, never looked back. I don't drive with the rear window down, so I've never had a problem with smell, and it did not change the sound.
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Old 03-15-2020, 08:44 AM #10
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Quote:
Originally Posted by 81runner View Post
Mine got smashed on a camping trip, so I cut it off right where it comes over the axle, never looked back. I don't drive with the rear window down, so I've never had a problem with smell, and it did not change the sound.
I did the same, just preemptively.

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Old 05-04-2020, 10:51 PM #11
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I just cut my resonator off this past weekend and welded a 2.5Ē 90į elbow out the side. No noticeable gain in mpg, performance or sound. I canít notice any drone at freeway speeds due to the fact my roof rack, light bar and tires are noisy.
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