Lx570 / LC Intake Sound (2 Viewers)

[willstroo]

As per another post in this forum, I previously had a Lexus ISF with its glorious NA 5.0l screamer of an engine. Miss that car. Anyway, I did a bit of work to the car, all the usual stuff including a tune.

One of the things I did was replace the stock intake tube between the factory air box and the throttle body. It gave a great little intake growl while maintaining the excellent stock airbox. Reliable, neat, functional, perfect.

I have been looking to do something similar in my LX, and have heard back from K&N with this:

2015 Lexus LX5705.7L V8 Gas Air Intake

The Cold Air Intake - High-flow, Roto-mold Tube - TOYOTA LAND CRUISER V8-5.7L for the 2015 Lexus LX570 with a 5.7L V8 Gas engine is guaranteed to increase power and torque.

www.knfilters.com

If you go down to the install instruction this is exactly what I’m after:

https://kandn.com/instructions/57-9040_inst.pdf

Now I personally won’t be installing the filter, but it comes with the kit, so whatever. I want the factory airbox to remain as is, I think it’s extremely functional. I’m just after the removal of the intake resonators for a bit more growl in the cabin. I know there has been discussion around the intake flow being affected at certain RPM, but this is not a performance engine, and I would bet a few $$$ that it’s just for keeping the intake growl sound at the lowest possible levels.

Has anyone had experience with this product? Any last minute “DONT DO IT!” warnings? Thanks in advance.

 

[willstroo]

Well, just pulled the trigger!! Let’s see how it goes..

I don’t think this is an oiled filter, so may actually just use the filter also. If it’s oiled then will stick standard.

 

[scrubolio]

curious if it changes the sound.

My only concern is the "hump" couplers and if they provide enough wiggle room when the engine moves independent of the body

 

[TeCKis300]

Cool. I've often thought to modify the stock intake tube, to hack off the resonate chambers that dampen the engine induction noises. The K&N tube looks like it'll do it. Curious to hear how it sounds!

I'm not so hot on the K&N filtering media however. Should work great for street use, but I'd definitely think twice before using it off-road in dirt and silt.

 

[willstroo]

curious if it changes the sound.

My only concern is the "hump" couplers and if they provide enough wiggle room when the engine moves independent of the body

It will definitely change the sound, usually it’s significant. But it’s only the intake sound, so no drone, and doesn’t affect anything unless the throttle is engaged hard.

I do know what you mean re wiggle room, the factory design does look like there is more wiggle, but that’s actually as much for sound deadening in that design than for wiggle. This part in the picture drastically reduces intake sound.

 

[willstroo]

Can confirm this has been installed, a few notes:
- There is a little bit more growl, not OTT at all, very subtle from the 2m drive I had.
- The pipe is pretty tight fitting, had to adjust the clamp positions a few times to get it right.

Overall, pretty happy so far, and will report back after some more driving. I would say this has scratched the itch i had for an exhaust, as its much more subtle, and only sounds different under medium / hard acceleration. But again, its very subtle.

 

[bjowett]

The intake tube from 2nd Gen Tundra is another option here. It has one resonator and a smooth transition through the tube. The 200 Series tube interior is not smooth where the resonators connect. @TeCKis300 the resonator will have an easier and cleaner removal if you choose that route.

@willstroo a little more noise can be added with an intake flap from an Camry. Similar to the airbox flap on your old F car, it is a smaller separate piece that can be added to just about any airbox. It does require cutting, though. I always wanted to find a way for the ECU to control the flap, just as the F cars do… but a manual switch would certainly be easier.

 

[NKP Garage]

Have a photo of the final install?

 

[willstroo]

I’m really trying to not cut anything, keeping stock filter, and basically trying to keep it as reliable / factory as possible.

But yeah that flap in the F car was awesome, there was a very simple mod I did where you block off the vacuum which “switches on” the secondary intake, basically holding it open. The intake roar was epic!!

Here are some photos. Looks clean and stock:

 

[TeCKis300]

The intake tube from 2nd Gen Tundra is another option here. It has one resonator and a smooth transition through the tube. The 200 Series tube interior is not smooth where the resonators connect. @TeCKis300 the resonator will have an easier and cleaner removal if you choose that route.

@willstroo a little more noise can be added with an intake flap from an Camry. Similar to the airbox flap on your old F car, it is a smaller separate piece that can be added to just about any airbox. It does require cutting, though. I always wanted to find a way for the ECU to control the flap, just as the F cars do… but a manual switch would certainly be easier.

Thanks! I recall you mentioned this before and I tried to lookup the part from a recycler and couldn't find one. Still might be interesting to try.

 

[RTaylor]

Back in my 4R days, we used PVC pipe and called this the Intake Silencer Removal (ISR) mod.

 

[willstroo]

After another solid drive, the only rpm range which seems affected is when under throttle load between 2,000-3,500rpm, above that and there is no real difference. It’s only a bit louder / throaty under load in that rev range, which I’m thrilled with.

 

[TeCKis300]

After another solid drive, the only rpm range which seems affected is when under throttle load between 2,000-3,500rpm, above that and there is no real difference. It’s only a bit louder / throaty under load in that rev range, which I’m thrilled with.

I wonder if that will get annoying in long distance towing? Lots of work under load in that rev range. Honestly that part of what's holding me back from really trying this.

 

[sedole]

This inspired me to try a tundra intake tube. Found one for only $45 on ebay so figured why not. I was initially planning on cutting off the resonator but decided to try it as is first. 100% bolt on including the hoses. Very subtle but noticeable sound change. Where the LX would "wheeze" before being revved it now has a slightly growlier/throatier sound. I like it and I'd like a little more of it haha

 

[TeCKis300]

This inspired me to try a tundra intake tube. Found one for only $45 on ebay so figured why not. I was initially planning on cutting off the resonator but decided to try it as is first. 100% bolt on including the hoses. Very subtle but noticeable sound change. Where the LX would "wheeze" before being revved it now has a slightly growlier/throatier sound. I like it and I'd like a little more of it haha

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Awesome! Now I gotta try. I believe part# 17880-0S010 .

 

[sedole]

Awesome! Now I gotta try. I believe part# 17880-0S010 .

Do it, very worth it! (especially at the price point I found it for) And yes that's the part # I got. It was advertised as the intake tube for the 4.6L tundras which may have been why it was so cheap. The others were around $100 or so. But the part number was the same.

No regrets on my highway commute this morning either, most of which is uphill.

 

[TeCKis300]

Do it, very worth it! (especially at the price point I found it for) And yes that's the part # I got. It was advertised as the intake tube for the 4.6L tundras which may have been why it was so cheap. The others were around $100 or so. But the part number was the same.

No regrets on my highway commute this morning either, most of which is uphill.

Yes. Looks like the same part number for all Tundra 4.6L/5.7L and Sequoias. These can be had new for $100 on discount for Yota. I found one for $55, but looks like there's examples over $100 used, so for the next guy, don't overpay.

 

[willstroo]

I am an absolute rev head, V8 addict, I have been so for around 30 years. I have built custom exhausts for cars and spent huge money on this glorious sound.

I’m telling you all, the way it sounds now has me not wanting an exhaust, it’s epic. So subtle, obviously no drone, and has a growl and that lazy throaty V8 throb under load that ticks the boxes while remaining completely “Lexus”. Its awesome.

This is about the driver experience, everything probably sounds pretty standard as you’re driving down the street, it’s not a “look at me” mod, it’s something you do for yourself. And it had me say out loud to myself just yesterday “I f**king love this car”.

 

[willstroo]

This inspired me to try a tundra intake tube. Found one for only $45 on ebay so figured why not. I was initially planning on cutting off the resonator but decided to try it as is first. 100% bolt on including the hoses. Very subtle but noticeable sound change. Where the LX would "wheeze" before being revved it now has a slightly growlier/throatier sound. I like it and I'd like a little more of it haha

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Well done, great solution!!

I reckon this would be about 60% - 70% as effective as the setup I bought for less than 30% the price #winningggggg

 

[sedole]

Well done, great solution!!

I reckon this would be about 60% - 70% as effective as the setup I bought for less than 30% the price #winningggggg

Based on the tundra youtube videos I've watched I'd say you're probably right. But....now I kind of want that extra 30-40%!

I think I might lop off the resonator and plastic weld it back to a straight tube and see what happens