[TexasSP]

Different dynamics between a gas engine and an ESC tht needs airflow across a heat sink to keep cool. Like I said, unless they offer a guarantee and free replacement if your ESC fries because of that thing I would stay away.

Airflow for an ESC has two parts, cool air coming in and hot air going out where as airflow on a gas engine only needs intake. Most likely that prefilter will stifle outgoing hot air flow which is why several people who have used it ended up with fried ESC's.