E-street cylinder heads for small-block Ford
with 1.90" intake valves sold in pairs) ................................................#EDE5023
with 2.02" intake valves (sold in pairs) ................................................#EDE5025
Technical Notes: Use with hydraulic camshafts less than .550" max lift. Recommended
spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.
Requires hardened pushrods. 289-302 c.i.d. with 7/16" head bolts requires #9680 head bolt
bushing kit. 1.90" heads are ideal for stock pistons; 2.02" heads require additional piston to
valve clearance. Not legal for sale or use on pollution controlled motor vehicles.

SMALL-BLOCK FORD: #EDE5023 | #EDE5025
Chamber volume...............................................60cc
Deck thickness ..................................................5/8"
Valve spring diameter (1.750" installed height) ........1.25"
Maximum valve lift ........................................0.550"
Rocker stud diameter (with guide plate)................3/8"
Pushrod diameter............................................5/16"
Intake
Port volume ...........................................................170cc
Valve size...................................................1.90" / 2.02"
Exhaust
Port volume .............................................................60cc
Valve size................................................................1.60"