PAIR ALUMINUM GM GMC CHEVROLET CHEVY VAN HUMMER H2 GMC VAN CADILLAC ESCALADE GM TRUCK SIERRA SILVERADO SUBURBAN YUKON AVALANCHE TAHOE 6.0 OHV V8 CYLINDER HEADS. LS3 L92 SQUARE PORT. THIS SALE IS FOR 2 CYLINDER HEADS. RIGHT AND LEFT SIDE. THIS IS FOR CAST NUMBER 823 ONLY. No CORE RETURN REQUIRED. If you need to leave us information about the cylinder head features you need. Example- The cast number is or I need the driver side head do the following. 1 CHOOSE A QUANTITY (LOCATED DIRECTLY ABOVE THE PRICE). FIND THE ORDER DETAIL BOX. IN SMALL PRINT YOU WILL SEE MESSAGE FOR ODESSACYLINDERHEAD ADD MESSAGE. TYPE YOUR CYLINDER HEAD…