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Instruction Sheets for Part Number HPE-2CH4HP1
ATK High Performance Vortec Cylinder Heads
Cylinder Head, Vortec, Cast Iron, 64cc Chamber, 170cc Runner, 1.940 in. Intake Valve, 1.500 in. Exhaust Valve, 0.525 in. Max Lift, Chevy, Each
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Estimated Ship Date: Nov 13, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
2CH4HP1
Part Type:
Product Line:
Summit Racing Part Number:
HPE-2CH4HP1
UPC:
00653517725005
Combustion Chamber Volume (cc):
64
Intake Runner Volume (cc):
170cc
Exhaust Runner Volume (cc):
62cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast iron
Camshaft Style:
Hydraulic roller/Hydraulic flat tappet
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
1.940 in.
CNC-Machined Combustion Chamber:
No
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Combustion Chamber Style:
Heart
Intake Port Location:
Standard
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Spark Plug Style:
Straight
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.500 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in.):
0.525 in.
Damper Spring Included:
No
Number of Springs Per Valve:
Single
Retainers Included:
Yes
Retainer Material:
Steel
Locks Included:
Yes
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
Positive stop
Rocker Arm Studs Included:
Yes
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
No
Valve Cover Mounting Style:
Centerbolt
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
23
Exhaust Valve Angle:
23
Valve Guides Included:
Yes
Valve Guide Material:
Cast iron
Valve Seats Machined:
Yes
Cylinder Head Color:
Natural
Finish:
Natural
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Heat Crossover:
No
Remanufactured:
No
Quantity:
Sold individually.
ATK High Performance Vortec Cylinder Heads
Vortec heads are known for cracking in different locations and can be costly to fix.
ATK High Performance Vortec cast iron cylinder heads save you the time and trouble of sourcing cores and waiting the long lead times at machine shops. ATK has used thousands of these heads in their combinations; they are proven upgraded castings with upgraded valve springs that allow for the use of a hydraulic roller or hydraulic flat tappet camshaft up to .525 in. lift to be used.
Some features:
* Cast iron construction
* Stainless steel valves
* Cast iron valve guides
* Viton® valve seal
* Steel retainers
* Screwed in rocker studs
* Straight spark plug style
* Accessory bot holes
* Assembled
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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