When ambient noise is low, yet you want a high degree of silencing., Nelson Critical "300" Level Silencers are the perfect choice. This line was specifically designed to reduce total engine exhaust
noise 25-35 dB. Critical "300" Level Silencers can be mounted in any position and feature all welded
construction, a durable double wrapped body and an "F" mounting flange (standard in sizes 4" to 22") and "P" male pipe threads (NPT ends offered in sizes 3/4" through 4"). Companion flanges are also
available for 4" to 22".
