The crappy thing with the W2 series engine is the need of an intake manifold because of the oval ports and the increased expense. Even though everyone is getting a new intake anyway. The price compare to a Chevy…. or a Ford……. that’s what the killer part is. That’s what gets most people.
Also, the OEM head isn’t a bad head, while limited, the fellas in the FAST game show how it’s done but it’s not a route guys want to take. It becomes “To much” for them.
The added expense of headers & rockers (intake covered above) is another crying point.
The Victor head is a good deal if your going “There” race wise. Excusing the W heads from this for a moment….
In the past, pre trick flow, a set of Edelbrock heads plus porting netted most guys a 300 + or - head. This porting cost another grand? Now we are up to 3400 or so? Yet it still falls short of the Victor.
The Victor is 2K a head and flows into the 360/370 cfm range.
Totally worth it from my point of view! Expensive? Yes and no. Dumping 4K is n a set of heads is a lot of money but your not going to get there from a standard Performer or other head.