do i need a blow down tube for my NX kit to pass tech?

 

yes, unless the tech forgets/doesn't check. but it is required.

 

i went with the jug in the hatch and they didnt even look. no blow down tube

 

you only need a blow down tube IF it is in what is considered the passenger compartment, that means if you have a coupe with no backseats you have to have one, if you have a hatch with nothing in it you have to have it, but if you have backseats in a coupe or a hatch and the bottle is technically "seperate" from the passenger compartment you don't have to have one.