I have a 90 Hp B5 and I'm told the only difference between the 90 & 110 is the nozzels. Would you recommend changing the nozzels or are they other down sides. I do not want to lose significant mpg. I have a performance box fitted so I can adjust the set up slightly, this did not effect the mpg. I've checked out a few web sites and they are advertising its possible, should I do it? Cheers for your advice.