Highest flowing sbm heads?

You’d be surprised. “Street manners” is very subjective and as I always say…95% of the time not having ”street manners“ is tuning.

And I don’t care so you are, making 2 HP/CID is a *****. Thats why you don’t see it very often.
You're not making 2hp per CID on pump gas N/A.
I don't care who it is that claims so and I know you never made that claim.
Hysteric :popcorn: