$275 Shipping
$275 Shipping
|
#35020088
$8,484.00
/each
Factory Shipped
Quantity
Need Help? Call to Order
Add to a list
Select an engine to verify Fitment
Select Engine
Long Block Crate Engine Type, Valve Covers Included
| Crate Engine Type | Long Block |
| Engine Displacement | 383 cu. in. |
| Camshaft Type | Hydraulic Roller |
| Cylinder Head Material | Aluminum |
| Piston Material | Forged Aluminum |
Made to Order
This custom item will ship when completed
Truck Shipment
Truck shipments must be pre-paid with a credit card, certified check or money order
Need help?
855.313.9176Quick and Easy Returns
Return PolicyThis is an LM7 (Iron LS1/LS6) based engine with CNC Ported Cathedral Port Aluminum heads making a very streetable 540HP+. Expect big mid to upper end power, will have a noticeable idle. For optimal Performance you will need headers, chassis dyno tune and 36lb injectors. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to run for optimal performance.
Engine Specifications:
Recommended Components:
Engine Info:
Notes: This engine can replace the 1999-2007 Chevy 5.3L LM7 engine with supporting modifications or any other factory LS equipped vehicle. It can also be retrofitted for aftermarket EFI/Carb setups. ECM MUST BE TUNED, not doing so can damage the engine. : A PCV valve must be ran; please follow the valve cover instructions provided. You must also run an Air-Oil separator system such as the Moroso #85487 to capture the excess crankcase vapors LS engines are known for. If you are not running a MAP Sensor, the MAP timing option in the timing control box must be zeroed out all the way across. Failure to do so will allow the controller to add timing which can lead to detonation. You must also run some sort of a steam line kit that dumps to your water pump, radiator or radiator hose; we recommend a 4 corner setup like the Trick Flow #TFS-306SB601. This allows air pockets/hot spots to escape the heads and can also be used to purge out trapped air when filling the radiator for the first time.
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.
Follow EPA, CARB, and state regulations for engine changes
CA WARNING:
Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov
| KEY SPECS | |
|---|---|
| MFG. Part # | LM7-LB-4 |
| Brand | ATK Engines |
| Crate Engine Type | Long Block |
| Engine Displacement | 383 cu. in. |
| Camshaft Type | Hydraulic Roller |
| Cylinder Head Material | Aluminum |
| Piston Material | Forged Aluminum |
| Carburetor Included | No |
| Intake Manifold Included | No |
| Distributor Included | No |
| Valve Covers Included | Yes |
| Cylinder Heads Included | Yes |
| Throttle Body Included | No |
| Timing Cover Included | No |
| Oil Pan Included | No |
| Water Pump Included | Yes |
| 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 | |
| Bore x Stroke (in) | 3.903" x 4.00" |
| Material Type | Iron |
| Sold in Quantity | Each |
Be the first to ask a question.
2002-2011 Cadillac Escalade
GM LM7
2003-2006 Cadillac Escalade ESV
GM LM7
2002-2006 Cadillac Escalade EXT
GM LM7
2002-2006 Chevy Avalanche 1500
GM LM7
2000-2002 Chevy C1500
GM LM7
1998-2002 Chevy Camaro
GM LS1
1997-2004 Chevy Corvette
GM LS1
1999-2014 Chevy Silverado 1500
GM LM7
2000-2004 Chevy Silverado 2500
GM LM7
2000-2006 Chevy Suburban 1500
GM LM7
2000-2006 Chevy Tahoe
GM LM7
2001-2006 GMC Savana 1500
GM LM7
2001-2005 GMC Savana 2500
GM LM7
2002-2005 GMC Savana 3500
GM LM7
2007 GMC Sierra 1500 Classic
GM LM7
1999-2001 GMC Sierra 2500
GM LM7
2000-2011 GMC Yukon
GM LM7
2000-2011 GMC Yukon XL 1500
GM LM7
1998-2002 Pontiac Firebird
GM LS1
2004 Pontiac GTO
GM LS1
