Okay, I have a mostly stock 125k 98 ls1 camaro. I bought it used around 3k miles ago. I put a k&n in it and I put an SLP lid on it. Well last weekend I changed the oil and cleaned the MAF. When I had all the tubing off the intake i noticed the throttle body blade has a small hole in it. Is this normal, or has someone done this for some reason? If so what is the reason?

 

Its normal, they all have that. Its for idle airflow.