and you would be wrong sir. They are indeed 21lb/hr injectors. The ECU reads them as 19's but they are in fact 21's
Here's a quote from Jerry who was with SCT " All GT's have 19's. The pink injectors are 19# injectors. I have no idea where this 21# stuff started from but it's WRONG. Now, the 3.8L's do use a 21# injector since 1999 when they introduced the split port motor."
There is no better source of information than Jerry, no matter what internet myths are out there.