|  2001-2004.5 LB7 SD manifold. This kit replaces the I/C hose on the passenger side return just before the air enters the engine. · This provides a means of running a boost sensor or what ever you wish to plumb in with out the need of drilling and tapping the engine intake manifold or I/C tube. · Ports are 1/16”-1/8”-1/4” NPT  · • 2004.5- 2008 LLY-LBZ-LMM SD manifold for the Duramax. This kit replaces the upper I/C boot, just after the turbo on the drivers side. · This provides a means of running a boost sensor, or what ever you wish to plumb in with out the need of tapping the engine intake manifold or I/C tube. · Ports are 1/16” and 1/8” NPT Please select vehicle before adding to Shoppng Cart: | Available Options: | | Vehicle Selection: | | |