foler

hello
Here in europe we have some emission standards (euro 1, 2 3..). Which standard and with WICH exhaust system LS series engines support???

Example, if I buy some crate LS engine and oem ecm kit how I know how much NO, CO, CO2 this engine produces with and without cats, which cats I need etc??? maybe some link with this infos?! e-rod ls3 kit dont have power which I want.

thanks