ATK High Performance GM 540 660 HP Stage 2 Long Block Crate Engines HP42M

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Part Number: HPE-HP42M

$14,109.00

ATK High Performance GM 540 660 HP Stage 2 Long Block Crate Engines

Engine Assembly, Stage 2 Crate Engine, Long Block, 2-Piece Main Seal, Chevy, Big Block, 540, Each
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ATK High Performance GM 540 660 HP Stage 2 Long Block Crate Engines HP42M

ATK High Performance GM 540 660 HP Stage 2 Long Block Crate Engines HP42M

HPE-HP42M

Not Yet Reviewed

Part Number: HPE-HP42M

Estimated Ship Date: Feb 2, 2027

$14,109.00

Overview
Applications
Required Parts
Recommended Parts
Q&A
Instructions & Calculators

Estimated Ship Date: Feb 2, 2027 Would you rather pick it up?

Three Kinds of Crate Motors

Three Kinds of Crate Motors

Engine Break-In Guide

Engine Break-In Guide

Overview

Brand:
ATK High Performance Engines
Manufacturer's Part Number:
HP42M
Part Type:
Crate Engines
Product Line:
ATK High Performance GM 540 660 HP Stage 2 Long Block Crate Engines
Summit Racing Part Number:
HPE-HP42M
UPC:
00653517259890
Crate Engine Family:
Chevy Big Block
Actual Engine Displacement:
8.8L/540
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, Retro-fit
Rear Main Seal Style:
2-piece
Intake Manifold Included:
Yes
Intake Manifold Style:
Carbureted
Cylinder Heads Included:
Yes
Carburetor Included:
No
Throttle Body Included:
No
Distributor Included:
Yes
Oil Pan Included:
Yes
Valve Covers Included:
Yes
Timing Cover Included:
Yes
Water Pump Included:
Yes
Harmonic Balancer Included:
Yes
Flexplate Included:
Yes
Flywheel Included:
No
Air Cleaner Included:
No
Spark Plugs Included:
No
Spark Plug Wires Included:
No
Computer Included:
No
Wiring Harness Included:
No
Stall Speed Rating RPM Range:
3,000
Supercharger Included:
No
Remanufactured:
No
Quantity:
Sold individually.

ATK High Performance GM 540 660 HP Stage 2 Long Block Crate Engines

Smash the competition or terrorize the street with ATK High Performance GM 540 660 hp Stage 2 long block crate engines. These engines are built around a rock-solid bottom-end and a free-breathing top-end to create a beast that is capable of 660 hp and 650 ft.-lbs. of tire-shredding power. ATK hand-assembles each of these mills out of top-of-the-line components to make them strong enough for the track, but reliable enough for street use, so you get the best of both worlds.

ATK GM 540 660 hp Stage 2 crate engines include:

* Dart Big M block
* High performance aluminum cylinder heads
* Intake manifold
* 4340 forged steel crankshaft and H-beam connecting rods
* Forged pistons
* Hydraulic roller camshaft
* Cam lift- .640 int./.640 exh.
* Cam duration @ 0.50- 243 int./249 exh.
* 10.1:1 compression
* Distributor
* Valve covers
* Timing cover and timing set
* Oil pan, pump, and pickup tube
* Water pump
* Front damper and flexplate

Required Parts

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Instructions & Calculators

CFM Calculator

Instruction Sheets for Part Number HPE-HP42M

Charts & Guides for Part Number HPE-HP42M

Technical Articles for Part Number HPE-HP42M

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

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This is a custom order part. You can order this part by Contacting Us.

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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