If you are upgrading your eninge to 125cc/150cc GY6 engine this is the Pod filter you need! This is a UNI foam pod filter will give your engine the breathing it deserves! If you have a big bulky air box on your GY6 engine, get rid of that sucker and get some thing that breathes. We always recommend upgrading the exhaust System to a performance one in the proces! If you have more air coming into the engine you should send more exhaust out to match it. This will complete your upgrade.
This will fit all stock carburetors on the GY6 Ruckus/Metro, Buddy 125c-170cc, People 125cc/150cc, and any carburetor or throttle body with a 44mm (+- 5mm) openening