Well like the title says, I'm looking to upgrade my LS1 timing chain and I hear through the grapevine that the LS2 setup will be a direct upgrade/replacement. Is this true? Are the upper and lower sprocket the same and will I need a new underdrive pulley?

thanks

 

Yes, Yes, Yes and no unless you want one.

 

Ditto. Infact you shouldnt even be able to buy an LS1 chain anymore. Theyll hand you the LS2.