right this was used on the dyno at psn on my runner.... obv everyone says polini one is better.. so they changed to the polini one and they was like :msn1: ayyy weve lost about a whole bhp since weve changed to the polini one.... so they looked at them both and the malossi one has been (ported) so andy said... lets more fuel in and what not... anyways its got a slit slit in it... litaraly 2mm big... duno if they is anything that can be done but if its any use to anyone im open to offers on it....