The Wagler/Brodix heads are expensive, yes. Have experienced some bumps in the road to this point, yes. Have they been cracking, yes some have. They are still better than anything else current available on the market when you are pushing for the maximum hp and rpm power possible. This year has been a very expensive one for Wagler and us in the R&D department figuring out what works and what doesn't. Brett's truck is a perfect example of this. He has been fighting head and head gasket issues all season and it looks like Wagler might have found the answer to his problem on Brett's motor and hopefully it spills over for the rest of our competition trucks. For those of you that are asking for the difference between these heads versus other heads available as far as hp or dyno curves, the difference we see is much wider power curves and a lot more sustained rpm hp. In drag racing were you are not limited on air you may not see as big of an advantage depending on your setups as you will in the pulling world. The major difference I see is from a tuning stand point. You are able to produce a lot more hp with alot less fuel and timing and it has much better rev gain because of it. For example Brett's truck running on tune3 ran 8.89@158mph on a 1847us @17.4 degrees@3250rpms on 175%inj with 102psi and 1550-1700degrees egt's on fuel only. When it grabs 3rd gr locked up it accelerates from 2650-4700rpms in 6 secs and is going from 13.5 degrees up to 20 degrees of timing max. Here is the video of the run and you can see that it runs clean also! The pistons are also helping some in this and they are proving to be most impressive to the amount of load they are holding without issue. Hope this info helps and doesn't confuse you more. If they didn't work we wouldn't continue to push forward with them to try and fix some of the issues we have had along the way!
https://www.youtube.com/watch?v=6e1EyHMARDg