On many air filters, even before you can see a separation, oil and fuel have started to deteriorate the glue holding the filter components together, causing tiny holes where contaminants can enter and damage your engine. Dynamite manufactures the Turbo Flow Pro Filters in a process where the base and foam element are truly a one-piece design, unable to separate. In addition, to give racers more room for adjustment in tight places, the .12 Pro Flow II base is off-set from the center to move the main body of the filter away from the engine's heat sink head and needle valve assembly. Plus, the filter base stretchs over the carburetor opening, so your filter stays put during a crash.