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Instruction Sheets for Part Number HPE-HP291PM
Charts & Guides for Part Number HPE-HP291PM
Technical Articles for Part Number HPE-HP291PM
ATK High Performance GM 350 330 HP Stage 2 Long Block Crate Engines HP291PM
Part Number: HPE-HP291PM
ATK High Performance GM 350 330 HP Stage 2 Long Block Crate Engines
Crate Engine, GM 350, Stage 2, Long Block, Internal/External Engine Balance, Cast Iron Heads, Chevrolet, 350 CID, Each
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Estimated Ship Date: Nov 9, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
HP291PM
Part Type:
Product Line:
Summit Racing Part Number:
HPE-HP291PM
UPC:
00653517328831
Actual Engine Displacement:
5.7L/350
Crate Engine Cylinder Head Material:
Cast iron
Engine Block Material:
Cast iron
Advertised Compression Ratio:
9.1:1
Assembled:
Yes
Engine Balance:
Internal/External
Cam Style:
Hydraulic flat tappet
Rear Main Seal Style:
1-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
Water Pump Style:
Long
Supercharger Included:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Dipstick is not included. Dipstick is located on the passenger side of the vehicle. ZZ4 250 dipstick is recommended.Internal balance on the front, external balance on the rear of the crank.
ATK High Performance GM 350 330 HP Stage 2 Long Block Crate Engines
Give your ride new life with these ATK High Performance GM 350 330 hp/380 lbs.-ft. Stage 2 long block crate engines. These engines are based on the tried-and-true small block Chevy and are built to perform right out of the box. ATK hand-assembles and balances each engine using top-quality parts to help them produce awesome power. Whether you are replacing an older, tired engine or just looking for a little more performance, ATK has you covered.
ATK GM 350 330 hp Stage 2 crate engines include the following:
* Handpicked, OE remanufactured blocks
* ATK cast iron cylinder heads
* 76cc combustion chambers
* 165cc intake runners
* 1.94 in./1.5 in. valves
* Stamped steel 1.5 ratio rocker arms
* ATK dual plane intake manifold
* OE crankshaft
* PowerBond 8 in. balancer
* OE 5.7 in. powder metal connecting rods
* Hypereutectic flat top pistons
* Hydraulic flat tappet camshaft
* .465 int./.488 exh. cam lift
* 224 int./234 exh. cam duration at 0.50
* 9.1:1 compression
* Distributor
* Valve covers
* Timing cover and double roller timing set
* Oil pan, pump, and pickup tube
* OE style long water pump
* 168 tooth flexplate
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