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NEW from Edelbrock - E-Street™ 170
- 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 |
| Combustion chamber volume |
60cc |
| Intake runner volume |
170cc |
| Exhaust runner volume |
60cc |
| Intake valve diameter |
1.90" & 2.02" |
| Exhaust valve diameter |
1.60" |
| Valve stem diameter |
N/A |
| Valve guides |
Manganese bronze |
| Deck thickness |
5/8" |
| Valve spring diameter |
1.25" |
| Valve spring maximum lift |
.550" |
| Rocker stud |
3/8" with guide plate |
| Guideplate |
Hardended steel |
| Pushrod diameter |
5/16" |
| Valve angle |
N/A |
| Exhaust port location |
Stock |
| Spark plug fitment |
14mm x 3/4 reach, gasket seat |
| Made In |
USA |
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| Description |
Complete (Pair) |
| E-Street 170 with 1.90" intake valves |
5023* |
| E-Street 170 with 2.02" 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
| #5023, #5025 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
65 |
121 |
174 |
216 |
242 |
249 |
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| Exhaust |
42 |
92 |
130 |
150 |
162 |
168 |
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AMC
Flathead
