• Shop › Ecotec LSJ/2.0/2.4 Head Flange Image 1 of 1 Ecotec LSJ/2.0/2.4 Head Flange $95.00 Billet LSJ (Ecotec) Head Flange for any DIY project. Ports are slightly oversized (gasket matched). PCV size is 3/8” NPT Purchase Added! Billet LSJ (Ecotec) Head Flange for any DIY project. Ports are slightly oversized (gasket matched). PCV size is 3/8” NPT