Could someone explain these mods?

I'm new, get over it

I was wondering if someone could explain what these mods are, and why people are doing them?

Differential breather mod?

Secondary air filter removal?

I thought I had 3 to ask about. I only have 2. That's embarrassing.

Anyway. What do these mods do and should I do them? Thank you in advance.

 

Search for them

The diff breather is for deep water crossings. It relocates the diff breather to a higher location.

The secondary air filter removal is supposed to reduce constriction in the intake and give more power.

 

i searched the 1st one... you search the 2nd! It takes about 4 seconds

http://www.tacomaworld.com/forum/performance-tuning/76495-diff-breather-mod.html#post1455222

 

Dont bother searching the second. It's simply a 2nd air filter that comes from the factory which is plastic riveted into your air box directly behind your drop in filter. Just rip it out. No real need for it.

 

When I changed my air filter recently, there was plenty of dirt on the riveted in air filter which needed to be wiped off. This dirt would have all been in the engine had the filter not been there.

Plus, is there really a benefit to removing it

 

Yeah, Toyota went to the effort to engineer it, produce it, and rivet it in just to annoy us.
Ever wonder why Toyota engines last so long? It's not any single factor, and no one really knows how the secondary filter figures into that.
That filter is there for a reason, make no mistake.

 

The secondary air filter is used to trap the residual evaporation of fuel from the intake system. Purley emissions requirements for new car production. IIRC.

Benefit of removing it is less restricted air flow, but truthfully I dont seem much gain over leaving it in. The ECU fuel maps are calculated for this and adjusted accordingly. If improved gas mileage is your objective, then I think you bought the wrong vehicle, best mod is your right foot on the gas pedal But I think it might help throttle response, but only minimally Of course I havent removed mine so can be totally sure. I think our trucks are pretty B.A. as they are. Only worthy mod of doing is a Supercharger IMHO. But there are pros and cons to everything. Just my perspective as a ASE mechanic and automotive technician of 7 years.
~Nick

 

It's not an air filter, it's a charcoal canister. We have a sealed fuel system. The vapors in the tank are sent to the engine and the canister keeps them from escaping into the atmosphere. When you start up the engine the next time, it sucks those fumes into the engine and burns them. It's part of your smog equipment.

You beat me to it, Nick.

 

Great minds think alike and the rest of us just fake it Nice expansion on what I said Moose.

 

It has an paper element on the exterior that clearly traps some particulate, it is not your typical evaporative emissions canister......The above explanations are over simplified....

 

It is not a charcoal canister, the dual charcoal canisters are located near the fuel tank.