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ATK High Performance Chevy LM7 5.3L Short Blocks

Not Yet Reviewed

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

* Seasoned 5.3L LM7 block
* 1999-

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

* Seasoned 5.3L LM7 block
* 1999-2007 year range
* Bore/stroke: 3.810 in. x 3.622 in.
* Displacement: 330 cu.in
* OEM GM 24-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
*

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

* Seasoned 5.3L LM7 block
* 1999-2007 year range
* Bore/stroke: 3.810 in. x 3.622 in.
* Displacement: 330 cu.in
* OEM GM 24-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

Showing In Stock Items. Show All 1 Items.

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ATK High Performance Chevy LM7 5.3L Short Blocks SP109

Engine Assembly, Short Block, 24 Tooth Reluctor Wheel, Hypereutectic Pistons, LM7, 330 CID, Chevy, LS, Each

Part Number: HPE-SP109

Not Yet Reviewed

Estimated Ship Date: Mar 27, 2026 if ordered today

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Estimated Ship Date: Mar 27, 2026 if ordered today

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