2003 casting SDPC gm fastbunr heads with some work done. valve springs were changed to compcam part #941.

flow
intake 275 at .60
exhaust 182 at .60

all machine work was done by advanced airflow engineering. post, pm or email at oddiez@hotmail.com for more info.

$1300 shipped. also have a matching reworked SDPC vortec/fastburn tpi base for an extra $300 if needed.