Using only the highest quality materials available, the M-7 is built to last. Exclusive use of a stainless steel spiral perforated core, designed further enhances the sound attenuation properties of the muffler, while still increasing the HP and torque of each model. The M-7 also features a removable Teflon coated magnesium end cap for easy removal of the Screen Type spark arrestor or for adding one of the optional sound suppresser sound tips. Allowing you to lower the decibels from 3 to 8 dbs depending on which P-Tip you choose. U.S. Forestry Service approved spark arrestors are included with all aluminum M-7 V.A.L.E. off-road exhaust systems.