GX470 exhaust mods - need suggestions

[nakman]

So about a year ago I installed a Dissent Offroad rear bumper on the GX470. It comes with a bottom plate that essentially erases the rear hanger for the exhaust, behind the resonator. It's also a good 6" higher up than the stock bumper, leaving the stock exhaust setup looking like it's hanging way low, and also a bit in harm's way. I put some bailing wire around it where the old hanger was, just behind the resonator, which as been working great. Here's a pic:

I now want to take this thing off the pavement, and while I don't worry too much about hitting it on a rock I know I may get myself into a pickle where I don't make it up something, and then slide backwards. I've done that before, in other vehicles. here's a pic:

I'll be taking that exact same line a week from Friday. And I have this feeling that if I slam that exhaust into the ground and continue to roll backwards it's just going to put stress on the whole exhaust pipe, and could likely break something more important than another hanger. So I'm looking to modify. The next hanger up is just behind the muffler, in front of the rear axle.

behind the axle there aren't any other hangers, other than my current bailing wire setup.

Here are the 2 options in my head right now...

And then the other questions would be, do I bother adding more bailing wire? Or just let it hang? And should I try to get another tip for the exhaust, to poke it more behind the tire? or just let it go under the bumper there? The one thing I'll say about this exhaust is it's HOT. I had a receiver hitch tray on there one time, with some luggage on it, and my father-in-law's suitcase was right behind it and totally melted. Not sure if that's normal, just hasn't happened to me before. Anyway, I look forward to your comments...

 

[CardinalFJ60]

I just had a great experience with Jeff at Boulder muffler. I have a habit of squishing my tailpipe.

He’s was awesome and once I let him know I wheeled my 100 series, he immediately said, let’s chop off the resonator, and he’d find a good place to dump the tailpipe.

When I picked it up he said he looked around to find a spot I hadn’t banged up and routed accordingly. I think he did a great job.

I cannot tell a difference in noise.

 

[Rzeppa]

I was about to suggest what Shawn beat me to! I did a similar routing on my 60, only instead of pointing down it it points outward just behind my tire.

 

[Burt88]

Same here. Cut off the resonator and did a little downturn just past the last hanger there.

I also recently replaced my muffler and now I sound like a cool kid.

 

[60wag]

Mine looked like Shaun's for a number of years but I got sick of the whistle. Not sure if the V8 whistles like the 1FZ. Jeff at Boulder muffler was able to tuck the resonator up higher so that the tip still exits behind the wheel.

 

[SaintAgatha]

I also have a 470 with a Dissent rear. Hi! 👋 We cut in front of the resonator. Maybe @DanS has a picture handy, I'd have to dig around for one.

 

[SaintAgatha]

Found it

 

[Corbet]

sound up for full experience.


View: https://www.reddit.com/r/AbsoluteUnits/comments/1aw49yd/of_a_muffler/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

 

[SaintAgatha]

@nakman I just realized this is you haha.

 

[rover67]

can you keep the resonator but re-plumb it so its mounted much higher up? Is there space to move it up?

 

[nakman]

can you keep the resonator but re-plumb it so its mounted much higher up? Is there space to move it up?

No I don't think there's enough room. I'm just going to chop it off... seems like the consensus is that it's not any louder without it.

 

[SaintAgatha]

No I don't think there's enough room. I'm just going to chop it off... seems like the consensus is that it's not any louder without it.

I can hear a difference, but it's only slightly louder. Nothing obnoxious.

 

[Rzeppa]

No I don't think there's enough room. I'm just going to chop it off... seems like the consensus is that it's not any louder without it.

The time constraint between now and CM is certainly a thing. No debugging, just a quick sawzall job like swiping a cat

 

[wesintl]

I can weld this up for you if you want…

after many exhausts i've found the straight rear exit with a turn down to be the best for wheeling. Just like st agatha's

 

[KC Masterpiece]

I made a very similar cut on the 80 and removed the resonator. Not any louder but I do get a bit of a whistle as a result. Sounds like a turbo and drives me crazy some days.No issues with exhaust in the cab.

 

[DaveInDenver]

FWIW, Tacomas have a low hanging tail pipe, especially when peeps go to a high clearance bumper where they trim the rear skirts.



So they do some sort of nip and tuck right at the muffler at the bend over the rear axle. This may be too aggressive for a SUV, not sure how the air flow might work to pull it back into the cabin.

 

[Squishy!]

We really like the Magnaflow Overland on our 4th gen. It's got a good noise, but it's not too loud and has way better clearance.

 

[nakman]

Ah heck yeah. @J1000 ftw, thanks again Jimmy!

 

[Jacket]

That's awesome. FWIW that's the same thing I did with my 80 after my exhaust got all mangled on Spring Creek. Resonator delete and a nice, clean tuck behind the tire.

 

[Corbet]

Mine has been dumping downward from above the frame rail behind the tire for over a decade. No issues with it in the cabin of the 80.