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Discussion Starter #1
Okay, so I'm feeling like I need a little more "umph" out of the engine of my Compass, but am limited in both funds and mechanical expertise. I've seen a lot of threads touting a Cold Air Intake, but to be honest, I'm not sure I could do that without really screwing it up. Someone else mentioned just plopping in a drop-in filter. Would that increase HP? If so, which one would fit the OEM airbox? I'm needing some advice on this issue. Thanks for helping a noob out!
 

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Order an AEM drop in filter - model #21-2047BF. You'll need to need to cut the AEM flange a little but no big deal. Not sure about exhaust vendors yet.
 

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Discussion Starter #3
Thanks GiantsNation. I've also heard recommendations of #21-204DK. Does one fit better than the other, you think? Confirming: This WILL fit into the stock air box?
 

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both should fit but the biggest problem with #21-204DK is the diameter of filter. The 21-2047BF's diameter is the same as stock - 5.25 inches. The 21-204DK has a diameter of 6 inches. May not sound like a lot but you don't have a lot of room in the stock airbox and there is no way to correct the problem if it does not fit. At least with 21-2047BF, I know 100% it fits and works. Again, you'll just need to cut about a half inch off the flange. And you don't need to be careful when doing this because of the way the filter mounts.
 

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Discussion Starter #5
Thanks - this is the kind of information I need! I wondered if the difference would work, or if the other filter would be *just* too big (which is infuriating). Thanks again.
 

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slight problem - I didn't realize you have a 2009. I looked at your "join date" and assumed you had a 2011 (stupid me!).

Your options are:
k&n panel filter - model 33-2362
green performance filter - model 7114
AEM Brute Force intake

You can also look into a Borla, Magnaflow or Gibson exhaust (I would recommend Magnaflow).
 

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keep in mind, you have a 4 cylinder car with a CVT. sluggishness is part of the game with fuel economy. adding a filter MAY give you 2-5 hp, and with the loss in power through the drivetrain, you might wind up with 1-3 hp at the wheels. do you think you'll feel 1-3 horsepower?
 

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Discussion Starter #9
I don't have a CVT. I have a 5-spd manual.
 

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keep in mind, you have a 4 cylinder car with a CVT. sluggishness is part of the game with fuel economy. adding a filter MAY give you 2-5 hp, and with the loss in power through the drivetrain, you might wind up with 1-3 hp at the wheels. do you think you'll feel 1-3 horsepower?
Feel it? Not only does my Compass feel more responsive, it is quieter. When cold, it no longer sounds like a choking diesel from the 1950s.

Next up for me is going to be a magnaflow exhaust.
 

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Discussion Starter #11
I might be leaning more toward the Green Filter or the AEM Brute Force. I can't seem to decide yet, so I'm holding off until I settle it in my head. I'd like to do the Brute Force, but am SO afraid of messing up my car, as it is my ONLY vehicle, and don't know a mechanic, so....hmmm....
 

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My dodge neon had a CAI that was in the fender and I had a 2 inch drop. I had the CAI for 170k of 203k miles. Never had an issue even with large puddles. The CAI for the compass as far as I can tell sits on top the engine so you have less chance of hydrolock your motor which in really what most people worry with when running a CAI. I also always keep my stock stuff in case I need to go back to the dealer for something.
 

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Discussion Starter #13
I'm not too worried about the water issue because of where it sits. Next question (sorry, I'm a noob): I've heard complaints about the "whistle" associated with the Brute Force due to the throttle body spacer. Is it tolerable? Also, will this affect emissions at all? I'm in Massachusetts, and they'll fail you for just LOOKING at them wrong.
 

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throttle body spacer? Our vehicle does not have this out of the factory. I'm not getting any more noise from my Brute Force. In general, this will have no effect on emissions.
 

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Discussion Starter #15
Good to know...thanks! It's amazing what you read online...when doing research, it can get confusing! There are some sites that say that the AEM Brute Force for Jeep Compass comes with a throttle body spacer, and that the noise level from it is "intolerable," so I thought I'd ask here. Thanks yet again!
 
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