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Instruction Sheets for Part Number HPE-LM7-LB-3
Charts & Guides for Part Number HPE-LM7-LB-3
ATK High Performance GM LM7/LS1 383CI 515+ HP Stage 1 Long Block Crate Engines LM7-LB-3
Part Number: HPE-LM7-LB-3
ATK High Performance GM LM7/LS1 383CI 515+ HP Stage 1 Long Block Crate Engines
Crate Engines, GM LM7/LS1 383CI 515 Plus HP Stage 1 Long Block, 6.3L/383, Assembled, Internal Balance, Aluminum Heads, Chevrolet, Small Block LS, Each
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Estimated Ship Date: Jan 26, 2027 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
LM7-LB-3
Part Type:
Product Line:
Summit Racing Part Number:
HPE-LM7-LB-3
UPC:
653517541254
Crate Engine Family:
Chevy LS
Actual Engine Displacement:
6.3L/383
Crate Engine Cylinder Head Material:
Aluminum
Engine Block Material:
Cast iron
Advertised Compression Ratio:
10.3:1
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:
No
Valve Covers Included:
No
Timing Cover Included:
No
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 LM7/LS1 383CI 515+ HP Stage 1 Long Block Crate Engines
ATK High Performance GM LM7/LS1 515 hp+ Stage 1 long block crate engines offer streetable horsepower producing big mid- to upper-end power with a noticeable idle. ATK Stage 1 or base engines are designed for those of you that may have component parts already and want to complete the build yourself.
Typically, ATK GM LM7/LS1 515 hp+ base engines consist of:
* LM7 5.3L Gen III iron block
* K1 4340 forged crankshaft
* Forged I-beam connecting rods
* Forged pistons
* Piston rings
* Hydraulic roller camshaft
* CNC-ported cathedral port cylinder heads
* OE rocker arms with trunnion upgrade
* Oil galley plugs are installed and sealed
All LS long blocks will include:
* LS2 lifter trays
* LS7 high-rev lifters
* Melling high-pressure oil pump
* SA Gear billet timing chain with 9 keyway adjustment
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