what does this do?

[pickinganame]

what would this do

[MrMX3]

It does exactly what it says it does. It will raise your fuel pressure as if it were at full throttle all the time. Check out herefor a good write-up on it on an mx-3

[Spydie]

it works....but it's not gonna snap you into your seat or anything. it will be most noticable at take off, after that it's pretty much the same just the throttle is a bit more responsive when you give it. You'll burn a bit more gas, so as it says....it's best to use it when you feel the need for a wee extra. I use a golf tee to plug the hose from the FPR.