GM Performance Engine Block, Aluminum, LS Mains, 4.065 in. Bore, 9.240 in. Deck Height, Each (PART #GMP-12729604)

GM Performance 6.2L LS3/L92 aluminum engine blocks are durable foundations for serious performance. Whether you're building a mild street engine or an Outlaw racing engine, starting your build with a strong base brings the assurance you'll make the power you need.

GM Performance 6.2L LS3/L92 blocks feature:

  • Block--strong, lightweight aluminum alloy casting with iron sleeves
  • Deep-skirt casting--the block's side extends below the crankshaft centerline
  • Production oiling system
  • Forged powered metal 6-bolt cross-bolted main bearing caps
  • 9.240 in. deck height
  • Use only LS1, LS6, LS2, L92/LS3-style cylinder heads
  • 4.065 in. finished bore (103.25mm)
  • Provisions for Active Fuel Management
  • Great for stroker cranks for even more cubes
  • Tested to over 500 horsepower

SPECIFICATIONS
Brand GM Performance
Manufacturer's Part Number 12729604
Part Type Engines, Bare Blocks
Product Line GM Performance 6.2L LS3/L92 Aluminum Engine Blocks
Main Journal Type Chevy LS
Engine Block Material Aluminum
Engine Block Style Stock/OEM standard deck
Engine Block Deck Height Standard deck
Deck Height (in.) 9.240 in.
Cylinder Bore Diameter 4.065 in.
Maximum Bore Diameter (in.) 4.075
Camshaft Location Standard
Main Bolt Style 6-bolt
Main Caps Included Yes
Main Cap Material Nodular iron
Main Cap Fasteners Included Yes
Main Bearings Included No
Rear Main Seal Style 1-piece
Finished Cylinder Bores Yes
Raised Cam Location No
Cam Bearings Included No
Freeze Plugs Included No
Remanufactured No
Quantity Sold individually.

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