LSX BLock
LSX Block
- Block: Precision cast iron ,CNC machined
- Bore: Siamesed, 4.25 max
- Stroke: 4.500 max
- Deck: 9.26 / 9.70
- Main Cap: 6-bolt billet
- Head Bolts: 6 per cyl. ( Accepts production 4-bolt)
- Crank Sensor: Production 58X

True priority main oiling, 6 head bolts per cylinder
Standard 4.400" bore spacing
Extra thick Siamese cylinder bores
Fully machined bores
Ready to hone fit
Semi-finished machined decks
Ready to be decked to your spec's
Increased deck thickness
LS7 style "dowel located" main bearing caps
Wet sump and dry sump capability
Deep skirted head bolt holes (same as OEM aluminum blocks)
All stock hole are stock thread size
Maintains all OEM LS family exterior mounting features
Front motor plate mounting holes added
Added material around cam bearings for additional strength
8 mm exterior 5th, and 6 th head bolt holes
All 5 cam bores machined for bearing 12453169
Standard .842" lifter bores
Screw in soft plugs
Accommodates any LS small block oil pan, and oil pump
External oil pump feed at rear of block
Main web to bay breathing holes for increased HP
Access windows for cylinder head stud access (intake side)
Extra breathing pocket added near starter for better windage Includes unique new cam retainer, rear cover, lifter retainers, and OEM replacement cam bearings


