MBRP M1004A Universal Quiet Tone Muffler<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Aluminized construction</li><li>Dual core technology provides optimal flow in conjunction with superior sound suppression</li><li>Perfect for over the road towing applications as cab noise is greatly reduced</li><li>Over a full year of on road testing</li><li>4 inch inlet/outlet; 30 inch length</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41%2BH0om%2BAPL.jpg" noproxy>