Highest flowing sbm heads?

Rat Bastid said
Unless the chink head has a raised intake port it won’t make anywhere near the power of a W5. Not even close. And not even if they both flow the same.

ThAt would be one of those times when a flow bench doesn’t tell you everything.

Absolutely agree. The chink head can get pretty far. On the street, not a big deal. On the track for a race car, very big deal. The chink head would be an easy 100HP down, no problem.