w/ SKF Bearing - - Except w/ B5254T4 Engine - This tensioner is for vehicles equipped with Mechanical Belt Tensioners and W/ Direct Ignition. W/ Direct Ignition = 1 coil per Cylinder ( 5-total per Vehicle ) W/o Direct Ignition = 1 coil per Vehicle ( 1-total per Vehicle ) - w/ B5254T4 Engine Only - W/ Mechanical Tensioner & W/ Direct Ignition This tensioner is for vehicles equipped with Mechanical Belt Tensioners and W/ Direct Ignition. W/ Direct Ignition = 1 coil per Cylinder ( 5-total per Vehicle ) W/o Direct Ignition = 1 coil per Vehicle ( 1-total per Vehicle ) -