Here is the RPM heads
http://www.summitracing.com/parts/edl-60829
Here are the Trick Flow heads
http://www.summitracing.com/parts/tfs-6161t784-c00/overview/
For $131.50 more you can get a head that is WAY better. These TFS 440 heads are the real deal!
I have 2 more sets on order!