SW has already discussed this. They can say anything did definitive yet cause they haven't built any.
Estimates weren't tremendous and I think many felt it wasn't worth it. My hope was for more low end torque, but that should not be expected.
But I'm in. I'm hoping it will be better than the cast manifolds.
2V motors will get great benefit in low end torque with shortys... As I remember they were leaning around 800-900 for a set as long as tehy got at least 10 ppl interested.