Its the symmetrical port head. Everyone else is still using the asymmetric head.

Fwiw valve layout in diferent. Alan has I-E-I-E-I-E-I-E the others are E-I-I-E-E-I-I-E. Heads were debuted at SEMA a couple years back. First versions did not work so well and everyone went back the old asymmetric stuff which is why Elite had issues finding heads. No one wanted to release the older asymmetric stuff.

"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"