Purchase a Milwaukee Eight® HPi aluminum, CNC ported intake manifold only.  HPi's M8® intake manifold will bolt to a stock throttle body with a slight step, no exchange needed, as it's just the manifold upgrade.  The manifold only will include an o-ring and a set of intake seals.  Utilize your stock flanges. 

*International shipments will be sent an additional money request for shipping fees. 

Part Number HPI-M8-MO *Fits Stock, 58mm HPi or 62mm HPi  

Part Number HPI-M8MO-70 *Fits HPi 70mm only