GM LT 5.3L And 6.2L (2014 And Up), Port Shape: Obround, OEM Standard Port Size: 2.25" Wide x 1.875" Tall, 2/Set GM LT Engine 5.3L and 6.2L. Year Range: 2014 And Up. Port Shape: Obround. Standard OEM Dimensions: 2.25" Wide x 1.875" Tall. 2/Set. (See PN 2090 for Weld Bead and Flat Face Header Applications).