Hi, Iv'e been lurking here for a while. I just installed this Emgo filter system on my 93. I am not running the connectors/rubber stacks. Don't know yet about the increase in mileage claim but after running the bike for 60 miles, here is what I know: Warm-up is smoother and requires less choke, throttle response will snap your neck (without the Vboost) , upon a hard throttle burst the carbs are obviously noisier but not irritating. I haven't taken a plug reading yet or don't have enough miles to see how the exhaust is burning. I do have the Cobra slip-on exhaust and in-my-humble opinion has "chocked" the engine in the past. My mileage used to be 34-35 mpg with a KN filter. I'll let you know on mileage and any jetting issues. One last thing about these filters: they are a wire mesh, not the oil able kind like the KN.
Ray