The Type 296 Silencer is a quiet spark arrester that should be used when riding in noise sensitive areas or any National Forest. The Type 296 Silencer is also U.S. Forest Service approved and will reduce your bikes noise level at or near 96dB on most models.Features Include: Spark arrested silencer Meets U.S. Forest Service standards Internal metal baffle, chambers, and sound absorbing materials for a muffled sound Constructed of aluminum and stainless steel Double-walled mounting bracket(s) Longer canister design keeps noise levels to a minimum No loss of motor performance