GlowShift Air Intake Heater Boost Plug Thread Adapter for 1999.5-2002 7.3L Power Stroke & 2001-2004 6.6L GM LB7 Duramax Diesel Compatible with 1999.5-2002 Ford Super Duty 7.3L Power Stroke & 2001-2004 6.6L GM LB7 Duramax Install Boost Sensor or Fittings to Intake Manifold Without Drilling and Tapping Replaces Air Intake Heater Thread Size: 1/8-27 NPT Female to m22 x 1.5 Male Free Lifetime Technical Support & One Year Limited Warranty