APR's premium line of sound absorption mufflers are now available! Perfect for the do-it-yourself enthusiast fabricating a custom exhaust system, these mufflers tame your exhaust note and leave a pleasant growl that's sure to turn heads. Internally the system is filled with sound absorption material wrapped around a perforated 64.5mm (2.5") pipe. This is a straight through muffler design. There are no twists, turns, or baffles to slow exhaust flow. You'll get full uninterrupted flow for maximum power. The whole system is made from T304 stainless steel and features strong and attractive TIG-welding throughout. The system is stamped with an APR logo and rolled with two sets of double ridges for additional structural strength and killer looks. To top it off, each system is fully brushed clean providing an attractive premium finish.