that's to much volume for those little stockers to make up for, unless your running 555cc's and at 18psi daily on them. FMIC are supporting over 1000hp, so your know there lots of room to make up for in that 10 times bigger space as stock IC's. But for that price that he said of $1200 or so, it would be a great deal for down the road upgrade. If it works out ok, then I'm in for a GB on them........