Fitment Information Nissan 350Z (2003 2004 2005 2006 2007 2008) Infiniti G35 RWD (2003 2004 2005 2006) Emissions Compliance This is a Y-Pipe and does not alter, replace, or modify any emissions equipment.  This item does not ship to California Specs & Features 2.5" piping steps to 3" What's included? 1x 350z / G35 Y-pipe 2x 2 bolt 2.5” exhaust gaskets 1x 2 bolt 3” exhaust gasket 6x bolts 6x nuts The ISR Performance 350z / G35 Y-pipe utilizes 2.5" stainless steel piping along with bellowed flex sections running from the 2 bolt catalytic converter flanges back to the high performance velocity merge. The Y pipe then steps to 3" stainless piping coming out of the velocity merge to the rear 3" exhaust flange. The Y pipe also features an integrated dimpled gusset plate tying the two individual runners together for increased strength and rigidity.The ISR Performance Y pipe was designed to provide the best possible exhaust tone, ground clearance, and performance, all at an affordable price!This will not fit on X model AWD G35s.