i bored out my ls motor .50mm and i was just wondering if i can just use a std bore head gasket or if i need to get an over sized one.

 

i do believe you need a gasket thats for 81.5 mm cylinders rather than 81 mm (stock), im not positive though, but you should have the combustion chambers on the head port matched to 81.5 mm, it would make way more power, that would be sweet, im gonna do that