A performance muffler suitable for installation into an exhaust system for an internal combustion engine wherein either end of the muffler may be designated as the entrance end for the receipt of exhaust gases into the muffler without materially altering the functionality of the muffler. Several patch files may then be aggregated into a secure, portable compressed archive to decrease the storage and transfer requirements of the patch file. New designs are iteratively generated in order to reduce power consumption and satisfy timing requirements of the design.