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ATK High Performance Chevy LM7 5.3L GEN IV Short Blocks

Not Yet Reviewed

ATK High Performance Chevy LM7 5.3L Gen IV short blocks are assembled with OE flat top pistons and offer these engine specifications:

* Seasoned 5.3L LM7 Gen IV

ATK High Performance Chevy LM7 5.3L Gen IV short blocks are assembled with OE flat top pistons and offer these engine specifications:

* Seasoned 5.3L LM7 Gen IV block
* 1999-2007 year range
* Bore/stroke: 3.810 in. x 3.622 in.
* Displacement: 330 cu.in
* OEM GM 58-tooth reluctor wheel crankshaft
* OEM GM forged powder metal rods
* Stock hypereutectic flat top pistons with two valve reliefs
* Compression ratios: 61cc = 9.8:1/64cc = 9.5:1/68cc = 9.1:1
-- Can vary due to deck height/gasket thickness
* Plasma moly rings
* Camshaft bearings: Installed and clocked to OEM position
* Freeze plugs: Installed

ATK High Performance Chevy LM7 5.3L Gen IV short blocks are assembled with OE flat top pistons and offer these engine specifications:

* Seasoned 5.3L LM7 Gen IV block
* 1999-2007 year range
* Bore/stroke: 3.810 in. x 3.622 in.
* Displacement: 330 cu.in
* OEM GM 58-tooth reluctor wheel crankshaft
* OEM GM forged powder metal rods
* Stock hypereutectic flat top pistons with two valve reliefs
* Compression ratios: 61cc = 9.8:1/64cc = 9.5:1/68cc = 9.1:1
-- Can vary due to deck height/gasket thickness
* Plasma moly rings
* Camshaft bearings: Installed and clocked to OEM position
* Freeze plugs: Installed and sealed
* Oil galley plugs: Installed and sealed

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ATK High Performance Chevy LM7 5.3L GEN IV Short Blocks SP115

Engine Assembly, Short Block, 58 Tooth Reluctor Wheel, Hypereutectic Pistons, LM7, 330 CID, Chevy, LS, Each

Part Number: HPE-SP115

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

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