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.
Features
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast aluminum
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- No
- Combustion Chamber Volume (cc):
- 60cc
- Combustion Chamber Style:
- Heart
- CNC-Machined Intake Runner:
- No
- Intake Runner Volume (cc):
- 170cc
- Intake Port Shape:
- Rectangular
- Intake Port Location:
- Standard
- Intake Valve Angle:
- 20 degree
- CNC-Machined Exhaust Runner:
- No
- Exhaust Runner Volume (cc):
- 60cc
- Exhaust Port Shape:
- Square
- Exhaust Port Location:
- Standard
- Exhaust Valve Angle:
- 20 degree
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 2.020 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.600 in.
- Valve Type:
- N/A
- Maximum Valve Lift (in.):
- 0.550 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Single w/Damper
- Outside Diameter of Outer Spring (in.):
- 1.460 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Manganese bronze
- Valve Seats Machined:
- Yes
- Valve Seat Material:
- Powdered metal
- Valve Seat Machine Style:
- 3-angle
- Retainers Included:
- Yes
- Retainer Material:
- Steel
- Valve Stem Seals Included:
- Yes
- Valve Stem Seal Style:
- Viton Positive stop
- Locks Included:
- Yes
- Lock Style:
- 7 degree steel
- Camshaft Style:
- Hydraulic flat tappet
- Spark Plug Style:
- Angled
- Guideplates Included:
- Yes
- Guideplate Pushrod Size:
- 5/16 in.
- Rocker Arm Studs Included:
- Yes
- Rocker Arm Nut Thread Size:
- 3/8-24 in.
- Accessory Bolt Holes Drilled:
- Yes
- Valve Cover Mounting Style:
- Perimeter bolt
- Heat Crossover:
- No
- Steam Holes Drilled:
- No
- Oiling Style:
- Through pushrod
- Machined for O-Ring:
- No
- Quantity:
- Sold as a pair.
- Notes:
- Designed for use with hydraulic flat tappet camshafts. Requires use of hardened pushrods. Part number 9680 head bolt bushing kit required for use with 7/16 in. head bolts. Not rrecommended for use with a hydraulic or mechanical roller camshafts. Spar
- Make:
- Ford
- Engine Family:
- Ford small block Windsor
- Engine Sizes:
- 4.7L/289-5.8L/351
- Years:
- 1963-1995
