The science behind the MegaBomb header may be FMF's greatest engineering accomplishment to date. It can bolt on a MegaBomb with an existing FMF slip-on for as much as a 3 HP boost, plus the MegaBomb actually reduces noise levels by as much as 1.5 dB. The MegaBomb technology has evolved to produce more low-end to mid-range gains as well as broadening out the mid to top-end power gains over stock. The MegaBomb is best used for Motocross / Supercross and GNCC style trails. Used by Factory Teams, the MegaBomb is the next level technology today. Produces long header torque and short header over-rev. Reduces sound output as much as 1.5 dB. Increases output from stock motor as much as 3 HP. Made from premium American stainless steel material. No. 1 Header in 2011 Supercross, Motocross, Motocross of Nations and Monster Energy Cup!