Sometimes you just gotta have the best of everything. When it comes to flow, you just can't get anything better than our Race Pro Muffler. This baby features a 'straight through' path with throughput that can be 95% of straight pipe! The throaty sound is surprisingly tame considering the absence of any impedance when you look down its barrel. At idle and low rpm cruising, you will not draw much attention, but upon acceleration, bystanders lookout! The Race Pro’s aggressive sound is the result of applying a layer of stainless mesh around a unique internal perforated tube, accompanied by a healthy stuffing of basalt insulation before the unit is sealed. Highly recommended for the track where every 1/10th counts. Of course, there are plenty of these mufflers hidden under some fine street machines too. Think of these mufflers as large inhalers for your car. 304 Polished Stainless Steel.