I need to order a new rim however I want to make sure I get the correct offset. I attached a pic and is the offset ET25?

 

Good question, what type of wheel is it? That can be correct but it is extremely aggressive. About as far as you can go. Have you rolled your 1/4 panels?

Sam

 

The rims are techart formulas.

 

Is that a front or a rear? Just asking because if it's a front, then an offset of 25 seems almost unrealistic and I wouldn't go by that stamp

 

19x11 +25??!! insane.

 

ETof course means 'Pushed In'
30mm is common on 11J 19s for 996TT.......if you have lowered (and hopefully firmed) suspension you probably also have some fender prep.
Techarts do not have custom offsets....what they make is what you get....spacer out is always an option.
25s have always been 'out there'.....a tad too far for me.....but I've seen em and they are less than .2" further out than the 30mm I mentioned......and, I 've always thought that Techarts measures on their offsets were conservative anyway.
Below is true 30mm on 11Js on the Turbo.
And below that Techart GTS on the wife's......w/final offset of 37mm.
Good luck.