I think Jon cornell from u.s.a is the only way you will get a new ufo exhaust. I have ufo exhaust and i can tell you that it will trump any exhaust you can put on your vmax. However it make's alot of noise so you might need to make up some smaller baffle's. I did and it sounds great, I weigh 268lbs in riding gear and i still ran an 11.71 in the 1/4 with the small baffele's in. fit and finish is top notch. All you do to change the baffle's out is take 1 bolt off and pop them out. I run open sometimes. just keep a wrench with you and it only take's a few min. I will pm you.