that's pretty interesting, would never have guessed a single was better <{POST_SNAPBACK}> Big single isn't better. This discussuion has been had before. Most of the drag GTR's do opt for a big single but after that they then step up to even bigger twins, something along the lines of twin 3035's. Two are always going to flow more than a single. <{POST_SNAPBACK}> Well it was what I was advised and considering my car is the fastest with a basic setup I think HPF should know what they were talking about <{POST_SNAPBACK}> There is no doubt that HPF know what they are doing and your car is the fastest. I was simple stating the fact that big twins are going to flow more than a big single. I'm not saying what your doing with your car is wrong because it's working extremely well.