Part number is yp-dr09, by several sellers on ebay. I was surprised by how nice this piece is for the price. Welds were good, the entire thing is Nicely polished, a magnet doesnt stick to it which tells me its actually a higher grade stainless than the factory exhaust or even the headers. It appears to be 16 gauge, so i have no concerns about longevity. My only issue was with installation, the angle near the slip joint merge was off by just a little bit. I couldve cut it and rewelded it where it needs to be, but instead once i managed to get the collector flanges tight i just stuck my jack under the straight part of the y pipe and pushed up until it forced the alignment where i was happy with it. Overall, i would definitely recommend going this route if youre willing to put forth a little extra effort to save a ton of money. JBA Headers and chinese y pipe can be had for around $600 which makes this an absolute performance bargain