[ferdsgt3rs]

This system was designed by Flowmaster in Santa Rosa they own the patten on the chamber and use veins to split the exhaust pulses to bring the sound level down too 93db from 112db with the factory megaphones.they designed it out of a series 80 muffler if you look you will see the veins and chamber. Porsche wanted double the cost for a perforated pipe wrapped in steel wool, over time the get louder and blow the wool out the exhaust