LM7 Based Shortblocks - ATK High Performance Engine https://atkhp.com/product-category/gm-crate/gm-ls-shortblock/gm-ls-lm7-shortblocks/ Building Performance Engines Since 1936 Thu, 21 Mar 2024 14:53:17 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.5 https://atkhp.com/wp-content/uploads/2022/12/cropped-ATKHP300x300-32x32.png LM7 Based Shortblocks - ATK High Performance Engine https://atkhp.com/product-category/gm-crate/gm-ls-shortblock/gm-ls-lm7-shortblocks/ 32 32 ATK SP80 LM7 383CI Short Block -3cc Flat Top Pistons 24 Tooth https://atkhp.com/product/atk-sp80-lm7-383ci-short-block-3cc-flat-top-pistons-24-tooth/ https://atkhp.com/product/atk-sp80-lm7-383ci-short-block-3cc-flat-top-pistons-24-tooth/#respond Wed, 17 May 2023 17:51:42 +0000 https://atkhp.com/?post_type=product&p=4598 Engine Specifications: • Block: GM LM7 5.3L (Iron LS1 / LS6) • Year Range: 1999-2007 • Bore/Stroke: 3.903” x 4.000” • Displacement (cu.in): 383 • Crankshaft: Manley 4340 forged 24 tooth • Rods: Scat premium pro 4340 I beam with ARP 8740 bolts • Pistons: Wiseco 2618 forged -3cc flat top moly skirt coated • […]

The post ATK SP80 LM7 383CI Short Block -3cc Flat Top Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> Engine Specifications:
• Block: GM LM7 5.3L (Iron LS1 / LS6)
• Year Range: 1999-2007
• Bore/Stroke: 3.903” x 4.000”
• Displacement (cu.in): 383
• Crankshaft: Manley 4340 forged 24 tooth
• Rods: Scat premium pro 4340 I beam with ARP 8740 bolts
• Pistons: Wiseco 2618 forged -3cc flat top moly skirt coated
• Rings: Wiseco GFX (alloy steel top ring)
• Compression Ratios: 65cc = 11.3:1 / 67cc = 11:1 / 70cc = 10.7:1 (can vary due to deck height/gasket thickness)
• Camshaft Bearings: Installed & Clocked to OEM Position
• Freeze Plugs: Installed & Sealed
• Oil Galley Plugs: Installed & Sealed

Recommended Components:
• Balancer- Internal balance
• Flex plate/ Flywheel- Internal balance
• Head Gasket: .051” or per application
• Oil Pump: Melling #10295 with high pressure spring

Engine Info:
• Oil: 10W40 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

 

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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.

The post ATK SP80 LM7 383CI Short Block -3cc Flat Top Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> https://atkhp.com/product/atk-sp80-lm7-383ci-short-block-3cc-flat-top-pistons-24-tooth/feed/ 0 ATK SP79 LM7 383CI Short Block -32cc Dished Pistons 24 Tooth https://atkhp.com/product/atk-sp79-lm7-383ci-short-block-32cc-dished-pistons-24-tooth/ https://atkhp.com/product/atk-sp79-lm7-383ci-short-block-32cc-dished-pistons-24-tooth/#respond Wed, 17 May 2023 17:49:31 +0000 https://atkhp.com/?post_type=product&p=4596 Engine Specifications: • Block: GM LM7 5.3L (Iron LS1 / LS6) • Year Range: 1999-2007 • Bore/Stroke: 3.903” x 4.000” • Displacement (cu.in): 383 • Crankshaft: Manley 4340 forged 24 tooth • Rods: Scat premium pro 4340 I beam with ARP 8740 bolts • Pistons: Wiseco 2618 forged -32cc dished moly skirt coated • Rings: […]

The post ATK SP79 LM7 383CI Short Block -32cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> Engine Specifications:
• Block: GM LM7 5.3L (Iron LS1 / LS6)
• Year Range: 1999-2007
• Bore/Stroke: 3.903” x 4.000”
• Displacement (cu.in): 383
• Crankshaft: Manley 4340 forged 24 tooth
• Rods: Scat premium pro 4340 I beam with ARP 8740 bolts
• Pistons: Wiseco 2618 forged -32cc dished moly skirt coated
• Rings: Wiseco GFX (alloy steel top ring)
• Compression Ratios: 65cc = 8.5:1 / 67cc = 8.3:1 / 70cc = 8.1:1 (can vary due to deck height/gasket thickness)
• Camshaft Bearings: Installed & Clocked to OEM Position
• Freeze Plugs: Installed & Sealed
• Oil Galley Plugs: Installed & Sealed

Recommended Components:
• Balancer- Internal balance
• Flex plate/ Flywheel- Internal balance
• Head Gasket: .051” or per application
• Oil Pump: Melling #10295 with high pressure spring

Engine Info:
• Oil: 10W40 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

 

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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.

The post ATK SP79 LM7 383CI Short Block -32cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> https://atkhp.com/product/atk-sp79-lm7-383ci-short-block-32cc-dished-pistons-24-tooth/feed/ 0 ATK SP78 LM7 383CI Short Block -15cc Dished Pistons 24 Tooth https://atkhp.com/product/atk-sp78-lm7-383ci-short-block-15cc-dished-pistons-24-tooth/ https://atkhp.com/product/atk-sp78-lm7-383ci-short-block-15cc-dished-pistons-24-tooth/#respond Wed, 17 May 2023 17:47:50 +0000 https://atkhp.com/?post_type=product&p=4594 Engine Specifications: • Block: GM LM7 5.3L (Iron LS1 / LS6) • Year Range: 1999-2007 • Bore/Stroke: 3.903” x 4.000” • Displacement (cu.in): 383 • Crankshaft: Manley 4340 forged 24 tooth • Rods: Scat premium pro 4340 I beam with ARP 8740 bolts • Pistons: Wiseco 2618 forged -15cc dished moly skirt coated • Rings: […]

The post ATK SP78 LM7 383CI Short Block -15cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> Engine Specifications:
• Block: GM LM7 5.3L (Iron LS1 / LS6)
• Year Range: 1999-2007
• Bore/Stroke: 3.903” x 4.000”
• Displacement (cu.in): 383
• Crankshaft: Manley 4340 forged 24 tooth
• Rods: Scat premium pro 4340 I beam with ARP 8740 bolts
• Pistons: Wiseco 2618 forged -15cc dished moly skirt coated
• Rings: Wiseco GFX (alloy steel top ring)
• Compression Ratios: 65cc = 9.9:1 / 67cc = 9.7:1 / 70cc = 9.5:1 (can vary due to deck height/gasket thickness)
• Camshaft Bearings: Installed & Clocked to OEM Position
• Freeze Plugs: Installed & Sealed
• Oil Galley Plugs: Installed & Sealed

Recommended Components:
• Balancer- Internal balance
• Flex plate/ Flywheel- Internal balance
• Head Gasket: .051” or per application
• Oil Pump: Melling #10295 with high pressure spring

Engine Info:
• Oil: 10W40 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

 

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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.

The post ATK SP78 LM7 383CI Short Block -15cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> https://atkhp.com/product/atk-sp78-lm7-383ci-short-block-15cc-dished-pistons-24-tooth/feed/ 0 ATK SP77 LM7 383CI Short Block -8cc Dished Pistons 24 Tooth https://atkhp.com/product/atk-sp77-lm7-383ci-short-block-8cc-dished-pistons-24-tooth/ https://atkhp.com/product/atk-sp77-lm7-383ci-short-block-8cc-dished-pistons-24-tooth/#respond Wed, 17 May 2023 17:46:38 +0000 https://atkhp.com/?post_type=product&p=4592 Engine Specifications: • Block: GM LM7 5.3L (Iron LS1 / LS6) • Year Range: 1999-2007 • Bore/Stroke: 3.903” x 4.000” • Displacement (cu.in): 383 • Crankshaft: Manley 4340 forged 24 tooth • Rods: Scat premium pro 4340 I beam with ARP 8740 bolts • Pistons: Wiseco 2618 forged -8cc dished moly skirt coated • Rings: […]

The post ATK SP77 LM7 383CI Short Block -8cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> Engine Specifications:
• Block: GM LM7 5.3L (Iron LS1 / LS6)
• Year Range: 1999-2007
• Bore/Stroke: 3.903” x 4.000”
• Displacement (cu.in): 383
• Crankshaft: Manley 4340 forged 24 tooth
• Rods: Scat premium pro 4340 I beam with ARP 8740 bolts
• Pistons: Wiseco 2618 forged -8cc dished moly skirt coated
• Rings: Wiseco GFX (alloy steel top ring)
• Compression Ratios: 65cc = 10.7:1 / 67cc = 10.5:1 / 70cc = 10.2:1 (can vary due to deck height/gasket thickness)
• Camshaft Bearings: Installed & Clocked to OEM Position
• Freeze Plugs: Installed & Sealed
• Oil Galley Plugs: Installed & Sealed

Recommended Components:
• Balancer- Internal balance
• Flex plate/ Flywheel- Internal balance
• Head Gasket: .051” or per application
• Oil Pump: Melling #10295 with high pressure spring

Engine Info:
• Oil: 10W40 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

 

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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.

The post ATK SP77 LM7 383CI Short Block -8cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> https://atkhp.com/product/atk-sp77-lm7-383ci-short-block-8cc-dished-pistons-24-tooth/feed/ 0 ATK SP76 LM7 5.3/5.7 Short Block -11cc Dished Pistons 24 Tooth https://atkhp.com/product/atk-sp76-lm7-5-3-5-7-short-block-11cc-dished-pistons-24-tooth/ https://atkhp.com/product/atk-sp76-lm7-5-3-5-7-short-block-11cc-dished-pistons-24-tooth/#respond Wed, 17 May 2023 17:44:54 +0000 https://atkhp.com/?post_type=product&p=4590 Engine Specifications: • Block: GM LM7 5.3L (Iron LS1 / LS6) • Year Range: 1999-2007 • Bore/Stroke: 3.903” x 3.622” • Displacement (cu.in): 347 • Crankshaft: OE Reground .010”/.010” 24 tooth • Rods: Scat premium pro 4340 I beam with ARP 8740 bolts • Pistons: Wiseco 2618 forged -11cc dished moly skirt coated • Rings: […]

The post ATK SP76 LM7 5.3/5.7 Short Block -11cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> Engine Specifications:
• Block: GM LM7 5.3L (Iron LS1 / LS6)
• Year Range: 1999-2007
• Bore/Stroke: 3.903” x 3.622”
• Displacement (cu.in): 347
• Crankshaft: OE Reground .010”/.010” 24 tooth
• Rods: Scat premium pro 4340 I beam with ARP 8740 bolts
• Pistons: Wiseco 2618 forged -11cc dished moly skirt coated
• Rings: Wiseco GFX (alloy steel top ring)
• Compression Ratios: 65cc = 9.5:1 / 67cc = 9.3:1 / 70cc = 8.9:1 (can vary due to deck height/gasket thickness)
• Camshaft Bearings: Installed & Clocked to OEM Position
• Freeze Plugs: Installed & Sealed
• Oil Galley Plugs: Installed & Sealed

Recommended Components:
• Balancer- Internal balance
• Flex plate/ Flywheel- Internal balance
• Head Gasket: .051” or per application
• Oil Pump: Melling #10295 with high pressure spring

Engine Info:
• Oil: 10W40 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

 

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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.

The post ATK SP76 LM7 5.3/5.7 Short Block -11cc Dished Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> https://atkhp.com/product/atk-sp76-lm7-5-3-5-7-short-block-11cc-dished-pistons-24-tooth/feed/ 0 ATK SP75 LM7 5.3/5.7 Short Block -3.2cc Flat Top Pistons 24 Tooth https://atkhp.com/product/atk-sp75-lm7-5-3-5-7-short-block-3-2cc-flat-top-pistons-24-tooth/ https://atkhp.com/product/atk-sp75-lm7-5-3-5-7-short-block-3-2cc-flat-top-pistons-24-tooth/#comments Wed, 17 May 2023 17:42:28 +0000 https://atkhp.com/?post_type=product&p=4588 Engine Specifications: • Block: GM LM7 5.3L (Iron LS1 / LS6) • Year Range: 1999-2007 • Bore/Stroke: 3.903” x 3.622” • Displacement (cu.in): 347 • Crankshaft: OE Reground .010”/.010” 24 tooth • Rods: Scat premium pro 4340 I beam with ARP 8740 bolts • Pistons: Wiseco 2618 forged -3.2cc flat top moly skirt coated • […]

The post ATK SP75 LM7 5.3/5.7 Short Block -3.2cc Flat Top Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> Engine Specifications:
• Block: GM LM7 5.3L (Iron LS1 / LS6)
• Year Range: 1999-2007
• Bore/Stroke: 3.903” x 3.622”
• Displacement (cu.in): 347
• Crankshaft: OE Reground .010”/.010” 24 tooth
• Rods: Scat premium pro 4340 I beam with ARP 8740 bolts
• Pistons: Wiseco 2618 forged -3.2cc flat top moly skirt coated
• Rings: Wiseco GFX (alloy steel top ring)
• Compression Ratios: 65cc = 10.3:1 / 67cc = 10.1:1 / 70cc = 9.7:1 (can vary due to deck height/gasket thickness)
• Camshaft Bearings: Installed & Clocked to OEM Position
• Freeze Plugs: Installed & Sealed
• Oil Galley Plugs: Installed & Sealed

Recommended Components:
• Balancer- Internal balance
• Flex plate/ Flywheel- Internal balance
• Head Gasket: .051” or per application
• Oil Pump: Melling #10295 with high pressure spring

Engine Info:
• Oil: 10W40 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

 

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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.

The post ATK SP75 LM7 5.3/5.7 Short Block -3.2cc Flat Top Pistons 24 Tooth appeared first on ATK High Performance Engine.

]]> https://atkhp.com/product/atk-sp75-lm7-5-3-5-7-short-block-3-2cc-flat-top-pistons-24-tooth/feed/ 1