LTE's exhaust systems are state of the art. Hand crafted out of 304 stainless, the head pipes contain a full taper from the port size all the way to the 2.25" silencer core. The silencer is constructed of aluminum with machined end caps. Each aluminum silencer is hand polished before leaving the assembly line. If you are a rancher or hunter, there are replacement end caps that will reduce the sound levels while maintaining a decent h.p. gain.