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Discussion Starter #1
so i have a stock air box in my 2015 ford focus sedan so what’s this snorkel delete and resonator delete??? i want to just take off the lid to the air box for my intake noise is that safe? i have a K&N filter, just wanna know some tips for a guy with a stock air box


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i have been running without the lid all summer had been getting 42 and up mpg the past 3 weeks ive seen my octane adjust ratio go worse with winter gas mileage dropped to 39 .ive also noticed when it gets down close to freezing my grill shutters stay open 20 percent prob so they dont freeze closed
 

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Discussion Starter #3
i have been running without the lid all summer had been getting 42 and up mpg the past 3 weeks ive seen my octane adjust ratio go worse with winter gas mileage dropped to 39 .ive also noticed when it gets down close to freezing my grill shutters stay open 20 percent prob so they dont freeze closed


so it’s safe for me to take off the lid?


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so it’s safe for me to take off the lid?


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Yes it's safe.
But you're really only making a bunch of noise.

Edit: If you're running a stock filter, you should upgrade. You can do the snorkel delete(search for info) and an open ended green filter for a compromise.
 

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Discussion Starter #5
my car has no cat and the muffler is lopped off so my car is already stupidly loud and obnoxious ?


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my car has no cat and the muffler is lopped off so my car is already stupidly loud and obnoxious ?


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Gotcha.
Also, see my edit above.
 
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