Chevrolet Performance LSX Iron Block 4.065 Bore / 9.240 Deck, The Chevrolet Performance LSX Bowtie engine blocks can accept a maximum stroke of 4.250 in., a maximum bore of 4.250 in., and they can support displacements of 454 cu. in. or more. The blocks feature cast iron construction with a powdercoated orange finish. They accept all Gen III and IV LS style cylinder heads, crankshafts, camshafts, and other components
- GM Performance LSX Cast Iron Block
- Bare Block
- 3.880 Bore
- 9.260 Deck Height
- 6 Bolt Main
- 1 Piece Main Seal
- Front oil feed lines that can be plugged or restricted for mechanical flat tappet or mechanical lifter applications
- Can be safely machined to 9.200 in. deck height
- 1054 Billet Steel 6-bolt main bearing caps
- 6-bolt cylinder head bolt pattern
- Cam bores that can be machined to accept 60mm roller bearings
- Can be machined for larger diameter lifters
- External oil pump feed at the rear
- Added 7th transmission bolt hole to work with early-style GM transmissions
- Can accept a front motor plate for racing use
- Threaded freeze plugs that can be used for external heaters or coolers
- Windowed main bulkhead
- Each