Not 100% sure. I do know it has a 3" exhaust. Down Pipe and a pulley drop, but not sure what size. I'm going to check it out in the next day or two. My friend said it pulled his car on the 2-3 shift. My friends car has 1.9 rocker setup with a 3.4 pulley and Downpipe along with PEMs. Oh yeah and he has a DHP PCM. I scanned my friends car and it runs strong with 0 KR, so this guy had to be pulling hard.