I dunno, mine was installed by the dealer but it appears to be working just fine, no leaks, no problems, bad gas milage and all. I think I've been getting 25mpg lately which is dreadful but I also don't ride it nice and slow I also need to get it fully tuned I'm sure I'm running rich as it tends to spit sputter and detonate a little in hot rush hour traffic all and all the FBF unit is just as good as the stucchi tho I'm sure its lighter