Ya I talked to Matt shear a month or so ago and he told me to go with the small bore. My K&T 10mill cub ran really well with the small bores. They were inframes. But have been reading up on the sniper pipes and if the numbers are true then you can't walk away from horsepower. My cub put down 106 horse on race gas, shear small bore inframe's, and 39's for carbs. That was the 3rd pull on a brand new motor. So the math does work out if the snipers do put out 10 more horse than the sheares. That would have put me right about the same number as what passion said they were getting. I was just looking for some current real results from the season this year. Don't mind buying or changing to what works. But dyno's don't always translate into numbers at the track.