Bore a 6.0 to 6.2?
#22
TECH Veteran
iTrader: (40)
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GM performance has a small bore head so I also wondered if they did anything with the 4" bore LS3 style heads (L76 or whatever engines were 4" with those rectangle heads) in stock applications or if they are all standard valve sizing. Never heard it mentioned that they did anything different so I always assumed they were stock size valves (same as for 4.065 motors) but I hate assuming.
#23
TECH Senior Member
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The minimum bore for LS3 heads is nominally 4". Anything smaller and valves hit cylinders.
#24
TECH Enthusiast
#25
TECH Senior Member