Edelbrock - E-Street 170cc
The Edelbrock #5025 E-Street cylinder heads are designed for Ford 289-351 W V8 applications. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. E-Street cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. The modern combustion chamber designs improve the combustion process and larger than stock intake and exhaust ports move more air through your engine for improve efficiency. For use on pre-pollution controlled vehicles only.INSTALLATION NOTES: - Ideal for operating in the idle to 5500 rpm range - Use with hydraulic flat tappet camshafts, .550" maximum lift - not compatible with hydraulic roller camshafts - 289-302 with 7/16" head bolts require #9680 head bolt kit - 2.02" heads require additional piston to valve clearance - 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.
Ideal for operating in the idle to 5500 rpm range
Made in the USA from A356 aluminum and heat treated to T-6 spec
Larger than stock intake and exhaust ports for increased power
Modern combustion chamber design for improved efficiency and mileage potential
Heli-Coil threaded inserts in the rocker stud bosses for proper torque load without damaging threads
Hardened spring cups between the valve springs and casting for wear protection
Cylinder Head Specifications
Description Complete (Pair)
E-Street 170 with 2.02 in. intake valves 5025
Technical Notes: Use with Hydraulic Flat Tappet camshafts .550" max lift. (NOT compatible with Hydraulic Roller Camshafts) 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. Rocker arm studs & guide plates are not included with bare versions of E-Street cylinder heads.
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O #5025
Valve Lift: .100" .200" .300" .400" .500" .600" .700"
Intake: 65 121 174 216 242 249 N/A
Exhaust: 42 92 130 150 162 168 N/A
* Not legal for sale or use on pollution controlled motor vehicles.