my ports were no where close to MW, nor was this intake. Slightly larger than what they were born with. we only ground opened up the intake windows slightly on the intake and blended them back about 4-5 inches. I know all combos like different things, but changing to this intake and a 1050 picked us up .5 and 4-5mph over the RB M1 and spacers topped with a 850. I was choking the poor thing pretty good apparently. My combo was running the "go to" cam of the day Ultradyne NF69 .640.