Wonder if this could be the cause of my poor mileage, bad gas smell, and pop between shifts.....
Pulled out the header and expected worse, ended up being an easy fix and 2 hours later she's on the road again. Sounds GREAT now, love the smooth sound of the SLP dual dual.

 

Dang, any idea how that happend? Good job on the fix.

 

Not a clue, bought the car with these fine Edelbrock headers already leaking like that.

Looking at the crack, it looks like a stress crack from running rich and a serious amount of afterburn.. or just a hot header hitting water. The car had issues before I bought it last month (misfire, running rich etc)