So i was looking at cfm charts and the 20g seems to be a good upgrade for my lg5 but i'm concerned about fitment and flanges. Is there a better swap?
The 20g turbo is not much of an upgrade for the TGP platform. I would recommend a GT2871R. I have had good experience with this turbo and the auto trans will put up with it if boost is limited at low rpms.
Whats the flow rate for that turbo
Stock T25 is 405 cfm max
GT2860 is 448 cfm max
GT2871R is 599 cfm max
TD06 20G is 685 cfm max
The TD06 will require tremendous amounts of modifications to fit our cars...