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Chevrolet

Chevrolet Performance LS GENIII 5.3L 450 HP / 420 LB-FT - Long Block

£4,499.94 GBP inc VAT
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SKU: SUM-150153

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£3,749.95 GBP

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Delivery ETA: Nov 26 – Dec 01
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  • Mechanical engine block on a white background
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Engine Details

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Engine Description

Looking for big LS engine power at an affordable price? Billy's Speed Shop remanufactured 5.3L LS long block crate engines are rated at 450 HP and 420 lbs.-ft. torque! This engine will give you the performance and drivability you have been searching for at a price you can afford. It can be a performance upgrade for 99-07 Chevy trucks, or an engine swap into your project vehicle. You will save time and money by leaving the machine-work and assembly to us. Just bolt on your accessories and drop it in.

Technical specifications:

* Horsepower: 450+
* Torque: 420+
* Block: Seasoned OE LM7/5.3L iron
* Bore/stroke: 3.800-3.820 in. x 3.622 in.
* Year range: 1999-2007
* Displacement: 323 C.I.D.
* Crankshaft: OEM GM 3.622 in. stroke internally balanced 24-tooth reluctor wheel
* Connecting Rods: OE GM forged powder metal 6.093 in.
* Pistons: Hypereutectic flat top
* Piston rings: Moly
* Compression ratio: 10:1 compression
* Camshaft: Pro LS Roller
* Camshaft specifications: Lift- 550/550, Duration @.050- 222/232
* Camshaft bearings: Installed and clocked to OEM position
* Cylinder heads: #799 or #243 OE aluminium 64cc 2.00 in./1.55 in. valves
* Freeze plugs: Brass installed and sealed
* Rocker arms: OE powdered metal 1.7 ratio
* Oil Galley plugs: Installed and sealed

Notes:
Not for 2007 and later trucks with Gen 4 engines. Exhaust and injector upgrades (about 36 lbs./hr. injectors for naturally aspirated) are recommended for optimal performance. ECU tuning is required. This engine includes a 1999-2007 Chevy Truck LM7 oil pump tube. If an aftermarket or different OEM oil pan is used, the appropriate oil pump pickup must be changed to match the pan. Do not re-use valve covers with plastic baffles. Leftover debris could damage engine. Not intended for marine use.
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Engine Specifications

Actual Engine Displacement
5.3L/323
Advertised Compression Ratio
10.0:1
Air Cleaner Included
No
Assembled
Yes
Cam Style
Hydraulic roller
Carburetor Included
No
Computer Included
No
Crate Engine Cylinder Head Material
Aluminum
Crate Engine Family
Chevy LS
Cylinder Heads Included
Yes
Distributor Included
No
Engine Balance
Internal
Engine Block Material
Cast iron
Engine Type
Long Block
Engine Type
LS
Flexplate Included
No
Flywheel Included
No
Harmonic Balancer Included
No
Intake Manifold Included
No
Oil Pan Included
No
Part Type
LS Crate Engines
Rear Main Seal Style
1-piece
Remanufactured
Yes
Spark Plug Wires Included
No
Spark Plugs Included
No
Supercharger Included
No
Throttle Body Included
No
Timing Cover Included
No
Valve Covers Included
No
Water Pump Included
No
Wiring Harness Included
No
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Package Contents

Kit includes all necessary components. Please refer to manufacturer specifications for detailed package contents.