[yimmy149]

I don't smoke either - but my radiator cavities seem to fill with butts quickly.

Getting a butt into the engine wasn't what I was worried about. If someone flicks a still-lit butt and it ends up ontop of a paper filter having massive amounts of oxygen pulled through it, it will catch the filter on fire.

I know the stock filter has foam on top of the paper, not sure if that would help or not.

-james