Stroker intake question and guidance, mainly guidance.

I'm lost. What's a flame thrower for the air cleaner? You young kids have a different vocabulary than us older gents.
LOL, I’m probably older than you. Old enough anyway to remember a few friends with those fire hazard air filters. But man, get that & some slappers, air shocks, & a Kraco 40 watt under dash power booster and you were ready to cruise