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reuse the existing disk in the valve
The air filter is placed under the original air box space and above the driver-side wheel well which is designed to pull in cooler outside air and increase horsepower
and (4) class 12
If you do NOT purchase an ECU from us you must send in a comptable ECU as seen in the images
They were designed primarily to be used with Gasoline based fuels
K&N 06+ Civic Si Drop In Air Filter Short ram Intake System reuse the existing disk inK&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace
