diff --git a/Case-Studies.md b/Case-Studies.md
index 542ced13..8781db7b 100644
--- a/Case-Studies.md
+++ b/Case-Studies.md
@@ -127,7 +127,9 @@ https://youtube.com/shorts/z1Yweyj2Nuc
 
 ## GDI
 
-TBD
+https://www.youtube.com/watch?v=e3pawcXSY6g
+
+https://youtu.be/5GshFiicFpU
 
 ## 2 stroke