1、Fitment: Replacement for Nissan 350Z coupe (non RevUp engine) 2002‑2008, replacement for Infinit G35 sedan (non RevUp engine) 2003‑2006, replacement for Nissan VQ35 Engine, etc. 2、OE Number: The replacing manufacturer part number for reference is BXIM 40201. Please double check the part number of your item before purchasing. 3、Function: Intake manifold plenum spacer kit is specifically designed to help increase the capacity of the manifold and reduce intake air temperature. 4、Heat Insulating: Intake manifold spacer is made of thermal polymer for excellent heat insulation and can be easily installed between factory intake manifolds. 5、Thickness: Intake plenum spacer is 5/16in thick for optimum fit and power potential. Power and throttle response have also increased due to increased efficiency. Item Type: Intake Manifold Spacer Material: Metal + Thermal Polymer OEM: BXIM 40201 Insulation Gasket Thickness: 5/16in Fitment: Replacement for Nissan 350Z coupe (non RevUp engine) 2002-2008 Replacement for Nissan 350Z roadster (non RevUp engine) 2003-2009 Replacement for Infinit G35 sedan (non RevUp engine) 2003-2006 Replacement for Infinit G35 coupe (non RevUp) 2003-2007 Replacement for Nissan VQ35 Engine 1 x Intake Manifold Spacer 18 x Bolt 18 x Gasket 6 x Support Pad