ATK High Performance GM 496 Stroker 600 HP Stage 1 Long Block Crate Engines HP631P

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Part Number: HPE-HP631P

$9,679.00

ATK High Performance GM 496 Stroker 600 HP Stage 1 Long Block Crate Engines

Crate Engines, GM 496 Stroker 600 HP Stage 1 Long Block, 8.1L/496, Assembled, Internal Balance, Aluminum Cylinder Heads, Chevrolet, 7.4L, 8.1L, Each
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ATK High Performance GM 496 Stroker 600 HP Stage 1 Long Block Crate Engines HP631P

ATK High Performance GM 496 Stroker 600 HP Stage 1 Long Block Crate Engines HP631P

HPE-HP631P

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Part Number: HPE-HP631P

Estimated Ship Date: Feb 1, 2027

$9,679.00

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Overview
Applications
Q&A
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Estimated Ship Date: Feb 1, 2027 Would you rather pick it up?

Overview

Brand:
ATK High Performance Engines
Manufacturer's Part Number:
HP631P
Part Type:
Crate Engines
Product Line:
ATK High Performance GM 496 Stroker 600 HP Stage 1 Long Block Crate Engines
Summit Racing Part Number:
HPE-HP631P
UPC:
653517518072
Crate Engine Family:
Chevy Big Block
Actual Engine Displacement:
8.1L/496
Crate Engine Cylinder Head Material:
Aluminum
Engine Block Material:
Cast iron
Advertised Compression Ratio:
10.1:1
Assembled:
Yes
Engine Balance:
Internal
Cam Style:
Hydraulic roller, OE roller
Rear Main Seal Style:
1-piece
Intake Manifold Included:
No
Cylinder Heads Included:
Yes
Carburetor Included:
No
Throttle Body Included:
No
Distributor Included:
No
Oil Pan Included:
Yes
Valve Covers Included:
Yes
Timing Cover Included:
Yes
Water Pump Included:
No
Harmonic Balancer Included:
No
Flexplate Included:
No
Flywheel Included:
No
Air Cleaner Included:
No
Spark Plugs Included:
No
Spark Plug Wires Included:
No
Computer Included:
No
Wiring Harness Included:
No
Supercharger Included:
No
Remanufactured:
Yes
Quantity:
Sold individually.

ATK High Performance GM 496 Stroker 600 HP Stage 1 Long Block Crate Engines

ATK High Performance GM 496 Stroker 600 hp Stage 1 long block crate engines are designed for street/strip use, so expect big power with a rough idle. They require an electric fuel pump. ATK Stage 1 or base engines are designed for those that may have their own component parts already, and who also are interested in completing out the build themselves.

Typically ATK GM 496 Stroker 600 hp base engines consist of:

* Seasoned OE block with 4-bolt mains
* 4340 forged crankshaft
* 4340 forged H-beam connecting rods
* Forged pistons
* Chromoly piston rings
* Hydraulic roller camshaft
* Aluminum cylinder heads
* Billet aluminum full roller rocker arms
* Timing set and cover
* Oil pan, oil pump and pick-up tube
* Valve covers

Applications

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Instructions & Calculators

CFM Calculator

Instruction Sheets for Part Number HPE-HP631P

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Some parts are not legal for use in California or other states with similar laws / regulations

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California Warning

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This product can expose you to chemicals including chromium (hexavalent compounds), which are known to the State of California to cause cancer and birth defects or other reproductive harm.

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