Quieting the RAI (Snorkel) Sound

[dunder]

What exactly did you do?

I ordered the parts listed by Dr Tron.
Unclipped the airbox.
Removed the air filter. It takes some wiggling to free it from the RAI connector.
Removed the RAI connector via the two bolts.
Removed the rubber cover on the lower inlet port on the air box.
Placed the new cover on side inlet port.
Placed the U-shaped duct on the lower inlet port.
Took some pictures.
Connected the shroud to the U-shaped duct.
Placed the airbox in the truck
Clipped the air box in place
Inserted the push clips into shroud to fasten to the truck.
Immediately took the wife for a drive and she was pleased. ?

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[h2o-bar]

Installed the TRD intake . What a huge difference and just what I was looking for. Now if I could only find a way to cover hole in the fender from the RAI so I could pull it as well.

 

[GDobbins]

Installed the TRD intake . What a huge difference and just what I was looking for. Now if I could only find a way to cover hole in the fender from the RAI so I could pull it as well.

If you figure out a cover let me know! I went the Stillen route which I also love.

 

[grizzlyoutlaw]

Thanks Dr Tron, I just pulled the middle RAI piece between the rubber elbow and upper RAI (that attaches to the A-pillar). I was hoping that it would quite the airbox noise but not so much (way better than stock though). I was just thinking that I wish I had a TRD pro sitting next to my TH so I could see if the parts would swap.
Do you have a before/after pic of the airbox mod?
Thanks agin Dr Tron for chasing this mod down. Now we just need someone to 3D print a cover for the fender and I'll take off the snorkel piece.

I am not sure how this attaches to the truck. Do you think it would be possible to easily attach this to a non-trail hunter, or is it drilling required? I am local to you and thought this would be a major benefit on these dusty roads.

 

[Hatman]

If you are like me and looking to get rid of the high desert air-intake (snorkel) because of how annoyingly loud it is with windows down, I figured it out. I spend too much time in the mountains or out on desert roads with the windows down and the intake noise made my wife and I roll the windows up. Not anymore!

You need 2 parts and 4 clips to convert the Trailhunter airbox to route like the TRD Pro airbox:

PTR03-35241-AE - Taco Coupling Kit (This is the red elbow for the front intake basket and the red cap that will cap the port being used by the high-desert intake)

17752-AK010 - Inlet, Air Cleaner (this is the inlet basket that hooks up to the red elbow and clip in above the front radiator support)

90467-07217 - clips (4 needed to clip in the inlet)

The work is pretty straightforward/intuitive and should not need any instructions. I think their are some YouTube videos out there from other aftermarket intakes that would show you removal. The only 2 bolts are the 10mm bolts holding the rubber elbow that connect to the high-desert intake in the fender.

I cannot say enough about how happy I am with this mod and being able to keep everything factory. Windows down is enjoyable again! I also did not realize how much of the intake noise you actually do hear with the windows up. Just got used to that over the 20K miles, but now it is weird for it to be gone.

So I did this install and it seems like my gas mileage went down more than 4 MPG. Anyone else notice this? Only thing I can think is the TRD Pro has openings in the grill that allow for more airflow into the intake and the Trailhunter is drawing hotter air up from the radiator area? I just swapped back to the original setup to conduct a more educated analysis.

 

[Dr.Tron]

So I did this install and it seems like my gas mileage went down more than 4 MPG. Anyone else notice this? Only thing I can think is the TRD Pro has openings in the grill that allow for more airflow into the intake and the Trailhunter is drawing hotter air up from the radiator area? I just swapped back to the original setup to conduct a more educated analysis.

Strange. I saw an improvement of about .5 MPG over the RAI. Currently get about 17.4 MPG combined, but I have an extra 1" lift over stock, roof rack and shell, and 34" tires + live in Utah and drive in the mountains regularly.

 

[Hatman]

Strange. I saw an improvement of about .5 MPG over the RAI. Currently get about 17.4 MPG combined, but I have an extra 1" lift over stock, roof rack and shell, and 34" tires + live in Utah and drive in the mountains regularly.

I dropped from 21 to 17.1.

 

[px3_taco]

Maybe start a snorkel trade thread, similar to the old hood scoop trades. Just find someone with the same color and swap all the parts.

I'd trade for a snorkel.

 

[dunder]

So I did this install and it seems like my gas mileage went down more than 4 MPG. Anyone else notice this? Only thing I can think is the TRD Pro has openings in the grill that allow for more airflow into the intake and the Trailhunter is drawing hotter air up from the radiator area? I just swapped back to the original setup to conduct a more educated analysis.

Like Dr. Tron, I saw a small improvement of approximately a half of an mpg. I’m sitting at 17.7 mpgs for mostly around town driving.

 

[trailhunger]

Like Dr. Tron, I saw a small improvement of approximately a half of an mpg. I’m sitting at 17.7 mpgs for mostly around town driving.

How many miles on your TH?

 

[Hatman]

How many miles on your TH?

1000. I’m already seeing better averages with it back to snorkel. After a few hundred miles I’ll try running both modes together.

 

[dunder]

How many miles on your TH?

About 8,500.

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