Holy clogged arteries Batman!!!

Performance Air Filter = Less Filtration = More Contaminants in the intake stream.

Doesn't matter where you drive, dirty air is dirty air. The factory CAI is pretty well designed, but dirt, dust, debris still get in the engine. Thickness of the filter media does not say much, mass, weave, material, ect. are more indicative of good filter design.

Now that being said, AFE and similar common use (will expand on that in a bit) high quality dry filters are pretty decent and don't lose too much filtration capability compared to OEM. That being said, a lot of people forget that "performance" means many different things. High-End Race Cars probably run the least restrictive filters (if any) compared to typical road-car; but then again those engines are torn-down and rebuilt every race or so.

Just because you can eek out some power and performance out of a vehicle, doesn't mean it's free; heat soaking, metal fatigue, bearing wear, ect. can compound and result in lower lifespan of an engine for that performance. Now most of the time, if tuned properly; a good balance between efficiency, performance, and reliability can be found. But more often than not, most people go about "tuning" a car all wrong; slapping on CAI & "CatBack" systems and throwing generic chips on the vehicle to eek out a few extra HP and force the transmission to work harder. But then again, most people either have money to spend or just pawn their mistakes off to someone else when it costs to much and blame the manufacturer/tuner/parts company/anyone but themselves for not properly building their vehicle. OR my favorite excuse, "it hasn't blown up/failed/broken/killed anyone/destroyed my car/ect. YET!"

TL;DR-

AFE is a good filter and it probably flows a bit better than factory with very minor lose in filtration performance. But thickness of filter media is not indicative of performance or flow characteristics.
 
Even with a tune your not going to gain much by just changing the filter. The filter does flow better but I did it more for the ease of use.

I should have added that since there is little to gain by changing it, personally I would stay on the safe side and feed my motor cleaner air.
 
Dam, all this from changing an air filter. Imagine the kickback I would have gotten if I changed my exhaust.

Only if you had said "Look how much smaller my new muffler is compared to the stock one it has to breathe better now!"

:lmao:
 
Given where our intakes draw air from I've always been surprised how little dirt actually gets sucked in. On my last suv the filter was just plain nasty about every 5k based on how the "oh so holy engineers" designed the intake. Same driving conditions.

You aren't all perfect, looking at you Greg.

Oh don't I know it. What we start off with is seldom the final design. Those engineers probably designed that intake several times, tested it and designed it again and again until it was optimal. Engineers are not perfect. Nobody or nothing is. I will always trust the guy who warrants my product instead of a bunch of guys on an internet forum.
 
So the OP bought a new air filter? Good great grand. Do the research and come up with your own conclusions on mods. It's not like he is putting AFE filters in our trucks at night while we sleep. It's HIS truck, let him put a GD filter in it. In the end, it's not our truck so not our problem.
 
Dam, all this from changing an air filter. Imagine the kickback I would have gotten if I changed my exhaust.

I don't think anyone cared about you changing your filter to an off brand, it was your misconception that it was better because it was thinner that got the responses.
 
I don't think anyone cared about you changing your filter to an off brand, it was your misconception that it was better because it was thinner that got the responses.

I know, I was just making fun of the situation. I was just shocked at how thick the stock filter was. AFE makes a good product so it's not an inferior filter IMO.

I never took offense to any of the comments or feedback given by forum members.
 
Oh don't I know it. What we start off with is seldom the final design. Those engineers probably designed that intake several times, tested it and designed it again and again until it was optimal. Engineers are not perfect. Nobody or nothing is. I will always trust the guy who warrants my product instead of a bunch of guys on an internet forum.

Those engineers are clearly inferior to Toyota engineers to begin with, I won't name names. :tape2:

Or the bean counters make all decisions...
 
Oh don't I know it. What we start off with is seldom the final design. Those engineers probably designed that intake several times, tested it and designed it again and again until it was optimal. Engineers are not perfect. Nobody or nothing is. I will always trust the guy who warrants my product instead of a bunch of guys on an internet forum.

Or they squeezed the engine in the engine bay and went, "oh frack... where do we put the battery?! OH! I KNOW! Let's stick it in the driver's side fender well! (ala Chrysler)
 
don't forget that there is also the bean counter side of things. Not just that Toyota engineers know everything, but there is a profit margin to be maintained.

There is always a BOM cost review of any product made. Be it iPhones, TVs, Toyota 4Runners.

Here are the sales #s for 5th gens per year from wikipedia...

2010: 46,531
2011: 44,316
2012: 48,755
2013: 51,625
2014: 76,906

That is 268,133 5th gen 4runners from the start till 2014...

If you can save 1 dollar per air filter that is an additional $268k of revenue. Mind you 4runners are low-ish volume compared to say Toyota Camrys.

If you have ever worked as an engineer for a Tier1 OEM supplier for an automotive manufacturer you will quickly understand that they are all after 1/4 of a penny. It's cut throat!
 
If you can save 1 dollar per air filter that is an additional $268k of revenue. Mind you 4runners are low-ish volume compared to say Toyota Camrys.

Its actually $268k in profit, not revenue. Revenue would stay the same, COGS would decrease and margins would increase.
 
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