Product Summary
Universal Fit, Deluxe Crate Engine Crate Engine Type
- This limited production 5.3L LS engine produces 475 horsepower and 435 ft-lb. of torque
- This all-aluminum engine is known for its extra-thick cylinder sleeves
- The flat top pistons are made from hypereutectic aluminum and connecting rods from powdered metal
- Performance upgraded camshaft has a total valve lift of .610 intake / 0.617 exhaust
- Upgraded valve springs compliment the high performance camshaft.
ATK Engines HPLH6N details
A 100 New GM LH6/LC9 5.3L engine that ATK has gone through and installed a performance camshaft package in. We also deleted the AFM/DOD for this engine. If you intend on using this for an application that utilizes the AFM/DOD, this must be turned off in the ECM. This engine will come with the valve covers and timing cover, NO OIL PAN OR PUMP. This is an all aluminum engine that is known for its extra thick cylinder sleeves. These are limited production, only 50 of them will be sold. *Dyno figures are based on using a 750CFM carburetor and Vic Jr. intake manifold with 1 7/8 headers. With an EFI system this will pick up power.
Engine Specifications:
• TQ: 430
• Block: New GM 5.3L Aluminum
• Bore/Stroke: 3.780”x 3.622
• Displacement (cu.in): 323
• Crankshaft: OEM GM 24 tooth reluctor wheel
• Rods: Stock GM
• Pistons: Hypereutectic Flat Top 9.9:1 compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 223/231 @50 .610/.617 112LSA COMP CAM #54-457-11
• Cylinder Heads: OE 799 or 243 aluminum 65cc 2.000”/1.575” valves
• Rocker Arms: OE powdered metal 1.7 ratio
Recommended Components:
• Oil- 5W30
• Fuel System – OE EFI System
• Intake – Stock Fuel Injected or Aftermarket
• Balancer- Stock Internally Balanced
• Flex plate/Flywheel- Stock Internally Balanced
• Spark Plug- Stock
• Spark Plug Gap- .035”
• Timing- Set to Factory Specifications Via PCM Module (Tune Required)
• Firing Order- Stock
• Fuel – 91 Octane
• Recommended Stall Converter- 2200+ based on application
• Headers- 1 7/8” depending on applicationNotes: This engine is a brand new GM 5.3L that GM built for 2005-2009 Trucks and SUV’s. ATK did a camshaft and valve spring upgrade along with AFM/DOD delete. For optimal Performance you will need headers, chassis dyno tune (required) and upgraded injectors. If you are using this as a swap for a vehicle mentioned above, the AFM/DOD will have to be turned off in the ECM. Power figures may vary depending on which induction system is used. Dyno figures are based on using a 750CFM carburetor and Vic Jr. intake manifold with 1 7/8 headers.
Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.
Specs
- Horsepower: 475
- Torque: 435 lb/ft
- Block: GM 5.3L Aluminum LH6/LC9
- Bore/Stroke: 3.780″ x 3.622″
- Year Range: 2005-2009
- Displacement: 323CI
- Crankshaft: OEM GM 3.622″ Stroke Internally Balanced 24 tooth Reluctor wheel
- Connecting Rods: OE GM
- Pistons: Hypereutectic Flat Top
- Piston Rings: Moly Rings
- Compression Ratio: 9.9:1 Compression
- Camshaft: Hydraulic Roller
- Camshaft Specifications: 223/231 at .050 in .610/.617 lift with 112 LSA
- Camshaft Bearings: Installed & Clocked to OEM Position
- Cylinder Heads: OE 799/243 Aluminum 65cc 2.000″ / 1.575″ Valves
- Freeze Plugs: Brass Installed & Sealed
- Rocker Arms: OE Powdered Metal 1.7 Ratio
- Oil Galley Plugs: Installed & Sealed
- Weight: 412
*Dyno figures are based on using a 750CFM carburetor and Vic Jr. intake manifold with 1 7/8 headers. With an EFI system this will pick up power.
Warranties
This engine comes with a 2 year/unlimited mileage warranty to the original purchaser
Guides & Documents
KEY SPECS |
|
---|---|
MFG. Part # | HPLH6N |
Brand | ATK Engines |
Crate Engine Type | Deluxe Crate Engine |
Engine Displacement | 323 cu. in. |
Horsepower | 475 horsepower |
Compression Ratio | 9.9:1 |
Torque | 430 ft./lbs. |
Camshaft Type | Hydraulic Roller |
Cylinder Head Material | Aluminum |
Piston Material | Hypereutectic Aluminum |
Spark Plug Style | Stock |
Combustion Chamber Volume | 65cc |
Camshaft Duration (.050 in) | 223° intake / 231° exhaust |
Camshaft Lift (in) | .610 intake / .617 exhaust |
Bore x Stroke (in) | 3.780″ x 3.622″ |
Carburetor Included | No |
Intake Manifold Included | No |
Distributor Included | No |
Valve Covers Included | No |
Engine Balance | Internal |
Cylinder Heads Included | Yes |
Throttle Body Included | No |
Oil Pan 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 |
GENERAL |
|
Assembled | Yes |
Cylinder Head Style | Assembled |
Intake Valves Included | Yes |
Intake Valve Diameter | 2″ |
Exhaust Valves Included | Yes |
Exhaust Valve Diameter | 1.575″ |
Valve Spring Included | Yes |
Retainers Included | Yes |
Locks Included | Yes |
Rocker Arms Included | Yes |
Valve Guides Included | Yes |
Head Gaskets Included | Yes |
Intake Gaskets Included | Yes |
Camshaft Included | Yes |
Cylinder Heads | OE 799/243 Aluminum 65cc 2.000″ / 1.575″ Valves |
Rocker Arm Ratio | 1.7:1 |
Reluctor Wheel | 24x |
Internally Balanced | Yes |
Sold in Quantity | Each |
Reviews
There are no reviews yet.