I'm getting conflicting advice on the size mains i need...If someone could help me I'd greatly appreciate it. Just wanna make sure I'm using this calculator right...I have a 05 Speedmaster, airbox removed, K&N pods, D&D pipes, approx 1,000 above sea (kansas city). I've been told I need 150 or smaller, 160, and I'm getting 154.5 when I use this calculator. Any suggestions would be greatly appreciated. The only mods before my airbox removal was the D&D pipes and dealer rejetted so I'm assuming pilots and needles are stock...
