- Engines & Components
- Engine - Assembled / Ready-to-Run
- ATK HP Crate Engines GM LS 6.0L / 460HP / 470TQ
ATK Engines High Performance Crate Engine GM LS 6.0L / 460HP / 470TQ
Items You Need
ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.
Please CLICK HERE for ATK Core Return Process
- Core return can be any Chevy LS 6.0L engine
This engine was designed to be a performance upgrade for LS based vehicles or perfect for a swap in a hot rod. For optimal performance, you will need headers, chassis dyno tune, and 36 lb. injectors.
- Horsepower: 460 hp
- Torque: 470 lb.-ft.
- OE LQ4/6.0L Iron
- Bore/Stroke: 4.040 in. x 3.622 in.
- Displacement: 6.0L
- Crankshaft: OE GM 24-tooth reluctor wheel
- Rods: OE powder metal
- Compression Ratio: 9.5:1
- Pistons: Hypereutectic
- Rings: Moly
- Camshaft: Hydraulic roller
- Cam Specs: Custom performance grind
- Timing Chain: OE single roller
Cylinder Head Information:
- Cylinder Heads: OE aluminum
- Combustion Chamber: 71 cc
- Intake Runner: 210 cc
- Valve Size: 2.000 in. Intake / 1.550 in. Exhaust
- Rocker Arms: OE roller rockers 1.7 ratio
Oil Pump Information:
- Oil Pump: Melling standard volume
Base Engine Includes:
- Short Block
- Timing Set
- Cylinder Heads
- Oil Pump
- Balancer: Stock internal balance/per application
- Exhaust: 1-5/8 in. Headers
- Firing Order: 18726543
- Flexplate/Flywheel: Stock internal balance
- Fuel Injectors: 36 l.b injectors
- Fuel Pump: Stock electric
- Fuel Octane: 91+
- Intake Manifold: Stock EFI intake
- Spark Plugs: NGK #739-3186
- Spark Plug Wires: Factory
- Oil Filter: Wix or K&N
- Oil Weight: 5W30
- Spark Plug Gap: .035 in.
- Stall Converter: 1800+
- Timing: Set to factory specifications via PCM module (Tune Required)
- Water Pump: Per application
Disclaimer: Power figures can vary based on parts used by the end-user. Some modifications to the vehicle may be required using these and or other aftermarket parts.
Engine Break-In Procedure
Use or break-in oil or conventional (non-synthetic) 10w30 oil with zinc additive for the first 500 miles of operation. Do not drive for long periods at any single speed, always vary your speed. Do not tow a trailer or put other heavy loads on the vehicle. It is best to avoid long periods of idling during this period. Check the engine oil and coolant levels daily.
Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. Let the engine cool down completely and repeat the process 2-3 more times. Do not idle the engine for an extended period at this time, this is critical for breaking in the camshaft.
At 500 Miles change the engine oil and filter using conventional (non-synthetic) oil with a zinc additive. Check fuel and ignition settings, adjust valves (where applicable). Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading or long periods of idling.
Change the oil and oil filter again at 1,000 miles. Continue using conventional (non-synthetic) oils and zinc additive, until about 4,000 miles. At that point, you may run a quality 10w30 synthetic oil if you choose. Use of oil with zinc or a zinc additive for the life of your engine is recommended.
I have a 1972 Chevy silverado reg cab C20 will this motor fit
I have a 02 Silverado 2500HD with a 6.0L. I would like to know if I swapped this high performance 6.0L out for my stock engine would it pass a SMOG check?
I have a 01 Silverado 6.0. Can I use the stock intake manifold and injectors and will the computer need to be retuned ? And what is the warranty on it ?
Can you use a stock torque converter or does it have to have a certain stall?
Does it matter if the core is a 5.3 or a 4.8 and not a 6.0 ,and what is the compression ratio on the motor,because I have a magna charger on mine now,or do you know if the magna charger will be ok on this engine?
would a fast 92mm manifold & thottle body work on here
What are the actual camshaft numbers? Lift, duration? How much lift will the valvesprings, pistons take? What is the current valve/piston clearance? What casting number heads do you use?
i figured about the stock intake manifold. my main concern was the oil pan/ timing chain cover, and my front accessories.
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