Not really after gains, but I don't want to be replacing it again with another OEM part. If I can go 70mm, I may as well open it all up as everything else in my system is significantly wider and its weird my cars eaten 2 of them now. One at 5k and this one at just over 31k. I've ordered the Grams 70mm unit. IIRC, Steve & Hurdy at Stattlers used to replace the TB's for their customers big turbo cars with a larger OEM unit (possibly the one mentioned above) to increase flow & throttle response, feedback from those owners suggested throttle response was greatly improved. Either way, i'm going to give it a go.