The stock fuel system and ECU will handle the 57 trim in MOST cases without issue. You may run into fuel cut at higher RPM but I don't think you should see much of that as long as you're not increasing the boost pressure beyond the stock level.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.
If you're so inclined I'm always more than happy to accept tips via PayPal. 
Tip Jar ---> 
|