normal airbox mod, good for you. except the ribs on the top piece don't need to be removed, they're as much to keep the top lid flat as anything.

 

Thanks for the feedback! I just pieced the information together and thought the baffles would have to be removed on the lid because it was a ribbed area that might trap or cause buffering of the incoming air as it is trying to exit the air box.

 

I test drove her at about 60 mph for fifteen minutes on the first day of the partially completed mod (I still need to straight pipe from the airbox to the engine), I noticed she felt a little peppier, she didn't feel as bogged down, the motor and exhaust sounded deeper, and when I had a friend rev her in park I could hear her taking in air. Now this may all just be perceived differences with no real gains but I believe it actually helped and didn't hinder. My biggest reason why I believe now is last night I drove her 144 miles, averaging 80mph, and I could actually hear the difference and feel the difference as I zipped along. She responded better to acceleration and didn't seem to labor on hills. Let me restate these are my perceptions and it is possible that when I drove the car before the mod on 9/13 for 144 miles it was about 5 degrees warmer out that day, she had a noticeable shake above 70mph, and it felt like I was trying to tow a anchor when accelerating. Also on 9/12 I had just done a full synthetic oil change and hadn't driven more than five miles before I hit the interstate for the 144 mile roadtrip. So the difference between the 9/13 144 mile trip and 9/15 144 mile trip was five degrees in air temperature, oil that should of been better broken down, no unexplained vibration at 70+ mph, security light never came on once (which the only thing I can think is, because the car was able to drink in more air she didn't vibraye, which in turn didn't mess with my security system if there is something wrong with the security system) better acceleration and passing power.

 

I recommend also taking out the air silencer behind the air box lid. I bought a 3" x 3" rubber coupling from home depot and it was a perfect fit, and it even makes the engine sound better

 

Thanks for the advice! Quick question, what is the silencer behind the air box? Is it the mesh screen I saw connected to the engine side of the air tube? What is a MAF screen and should I keep it ot remove it? Can you post a picture of your modified air intake for comparison? Sorry i'm a visual learner lol.

 

View attachment 51290 The silencer is the big plastic piece between the throttle body and the air box. It is your air box, the ribbed connector, the silencer, then another accordion type connector then the throttle body. DO NOT remove the MAF screen. That will hinder you in the end. It is needed to properly calibrate the air flow. The Mesh screen you describe is probably the MAF screen.

Some people use the stock accordion style connectors but just buy the coupler from home depot because that will keep your air passage smooth and less turbulent.

 

Jason is correct in not removing the mesh screen, as it won't do much for a car anyways even if the air flow was already even.

Here's a picture of the silencer I'm talking about (outlined in green):

 

I also very carefully increased the size of the outlet of the air box by heating if with a torch and rolling the edges out with a very big socket. If you try it it take your time.

 

Ribbed connectors I have been calling air tubes lol, okay I get it now, remove the silencer and connect the two ribbed connectors together with a 3x3 rubber coupling. Air intake box is where the air initially enters into the vehicle, then to a ribbed connector, then the silencer, then to another ribbed connector, through the maf screen that appears attached to the throttle body. Thanks for the great info. I was thinking I had to pipe from the air intake box to the throttle body, I was not looking forward to trying that level of customization, connecting two ribbed connectors sounds alot easier.

 

Im not sure if you have one but a cold air intake would be great with this mod

 

I thought the 99s intake was already considered a cold air intake because it pulls in air from outside of the vehicle?

 

If I may the washers are to allow air flow into the sections you cut off that are other wise resting directly on a metal support right?

Sent from my SGH-I997

 

Going to give this a go today, thanks for posting it.

 

This looks easy enough to do

Living in California with its smog laws, doing this simple mod wont interfere or prevent passing a smog test will it ??

 

Thanks Mr. Injuneer, we did do the mod but left the silencer in place for now, might pull it off at a later time. The mod did make a slight difference in the sound of the motor for the better.

 

Jason is correct in not removing the mesh screen, as it won't do much for a car anyways even if the air flow was already even. Here's a picture of the silencer I'm talking about (outlined in green):

 

This is my next mod. Do you think cutting the plastic, raising it, and removing the silencer will be close to the K&N intake mod? That's like $400 and I don't want to spend THAT much on an air filter and some plastic. Huge rip off!

It probably doesn't do as much but I'm sure it will have a small noticeable boost.

 

So this is basically how you can turn your base intake into a ram air? I might do this myself, the k&n is way too much, even after my discount at work. I wonder if you can do this and then add the k&n filter from the cai kit for much cheaper? You'd have to MOD the filter box and/or change it out all together but I think I may be able to make this work.

 

Does anyone know where i can get the big push retainers that hold the air hose to the main bottom airbox assembly? Found one that's broken on mine, looks like it was torn to shreds, I'd like to get it replaced so it just looks a bit nicer, but i cant find any that are for that.