odd i was just looking this up and the stock asain carb was rated at 326 cfm the stock cfm on the 20r carb is 190cfm http://www.toyotanation.com/forum/showthread.php?p=2259216
i have also sen both number ratings...... 190cfm and 326cfm.... i figured the lower cfm rating could be an advertisers rate to boast the rating on whatever modified carbs they offer....... but i think i have seen holley also rate the stock asin carbs at 326cfm. 326cfm is the more commonly stated rating i have seen so i figure thats more likely.