Actually, it was their previous manifold that pissed many people off, the SSV
A lot of people lost power and it damaged the brand image, many people not prepared to by the newer velocity
They claim +30hp at 6,800
But you won't get any gains unless you tune the engine on a dyno - there goes another $1K to $1.5k
Even then most people are getting +10hp to +15hp which is only half of what Kinetic claim
Supercharged engines have obtained better results with the velocity manifold