This is our latest revision of our well known SEP auto vibrant y pipe. Constructed out of 6061 aluminum with an integrated intake portion. Each y pipe has a port matched merger section and is sandblasted internally to ensure Minimal turbulence and better maf readings. In addition this design features built in diverter valve ports that eliminate factory lobster claws making it unique when compared to similar products on the market. Backed by a lifetime warranty this product is a must have for any high horsepower s4.