Hmf Engineering Competition S/o Raptor 700 Yamaha Raptor 700 15 Mufflers / Slip-ons #141723606186 Designed and tested for dirtbikes and ATVs The Trimax Core technology features 3 levels of power and sound, allowing you to dictate the type of power and sound you need, when you need it Included with every exhaust are 2 removable inserts, each of which effect the sound and power in different ways, giving the rider complete control Stage 1 Uses an insert that restricts sound levels extensively yet produces industry leading power at the approved dB level. Stage 2 Uses a different sound-altering insert that partially lowers sound levels without losing the power increase gained in Stage 3.