The RHS heads are apparently hard to come by. Castings are in high demand and/or low availability. But the raised port certainly makes them interesting!

Chris also sells the Brodix BR7 which is another good casting option. It's been a little hard to find much comparative information on the 2. Since they are a porter for both, FRH would be a good source for some thoughts on them. If you learn anything, please do post it back here...

 

MAST heads are hard to beat in real world track testing. Many of the fastest LS7 headed cars are using them. They also happen to dyno highest if you care about such nonsense.

 

One of the reason I went with MAST for my build was knowing that I have one of the best heads and not look look back and leaving anything on the table. I only want to build this motor once!

 

Agreed BOLO build it right; build it once.

RHS LS7 comes in two options 291cc and 307cc. look into which of the two works best for your combination/goals