The DMC Force-4 megaphone system produces maximum force to accelerate a modified Raptor 700. Twin megaphones deliver maximum engine efficiency, and the reverse cone of a megaphone times the negative wave pulse reflection to correspond with the period of valve overlap. This is a true bolt-on system and fits all Raptor 700 models with no cutting, bending or hacking required. The DMC Force-4 is produced using 100 percent stainless steel headers and megaphone construction. Large diameter max-flow individual headers are easy to install and mount on each side of the Raptor, with the entire system tucking neatly inside the frame rails. See all the Force-4 has to offer at www.dmc-on-line.com.