What does this mean: SAP
Jim
SAP - “Same As Port” - Flange closely matches port shape in cylinder head.
Round - For stock round ports or oversized tube applications
D-Port - Typically fl at fl oor and sides with radius on roof of port.
Oval - Two sides half round. Horizontal and vertical oval.
Square - Nearly equal height and width with varied corner radius.
Square Oval - Made popular by the 18° Chevy, has radiused roof and floor.
Rectangle -








