that looks EXACTLY like the one i bought off ebay a month. only i paid $5+shipping. the bolts dont line up and the opening was 3" OUTER diameter. making the opening 2.75". basicly like putting a restricter over your maf
That adapter is designed to fit a filter with a 3" opening. That means the inside measurment on the adapter will be 2 3/4", not 3". It's easier to find a 3" filter than a 3 1/4" filter.