I was installing my slp headers and I have a broken head bolt. What are my options? Do I have to pull the head off?

 

Go to Lowe's or a similar hardware store. Get a screw extractor that comes with a left-hand drill bit. Spray the broken bolt down with WD-40 and let it sit for a little while, then drill into the end of the bolt wit the left-hand bit. If you're lucky the bit will hang on the bolt and pull it out. If not, you'l have to drill the hole deep enoug to use the extractor. It's a PITA and if it's one of the back bolts you'll probably have to pull the head to get it out.