PLM Axle Back Exhaust Muffler Delete V2 - Chevy Camaro V8 2010 - 2015 Stainless SteelPLM Private label Mfg. axle back exhaust, also known as muffler bypass, muffler deletes, or track pipes, are made of TIG welded stainless steel. By removing the restrictive factory mufflers, PLM axle back exhaust will offer better throttle response, improved gas mileage, more hp, more tq, and of course, amazing sound! The piping of this axle back exhaust has an outer diameter (OD) of 3" (76mm), with dual 4 inch double wall slant tips. Dual exit for