BTR
BTR LS DUAL .660 Spring Kit - Steel Retainers
BTR engine clock coolant plug that can be used in place of GM part # 12561663.
Includes:
(1) BTR61663 Large Coolant Plug
(3) BTR88949 Small Coolant Plug
(1) BTR73460 Oil Galley Plug
(1) BTR27693 Plug Core