BF GTX is 1.6l
BG GTX is 1.8l and is bolt up. You'll get those kind of answers when you dont search for stuff. People get real tired of hearing the same questions when most of the info is on the same page that you are posting the topic on. If you want to ask a question like that just pm someone you know is turbo'd about it so you dont cludder up the forums with age old questions.