Trick flow

TF flow numbers are listed as tested on a 4.00” bore, 1-7/8” flow tube on ex.

Valve spring packages are from 1.900”-2.00” installed height, and up to 1.580” diameter.
I assume the specified HS rockers will clear the springs.

Try and get that situation(1.580” spring at 2” installed height) on an RPM head.

Not too mention, if they’re priced similar to the BB heads...... they’ll be less expensive than a set of CNC rpms.

I predict they will fly off the shelves.