the nikki 12a 4 bbl 315 cfm, most the complicated bolt ons can be deleted, as some body else said it can be opened up to 450 cfm's, its a spread bore carb, vacuum secondary's but easy to convert to mechanical, parts easy to find!! came on 78-85 rx7s, dont seem to be many out in the world tho'!! then theres the hitachi 4bbl used on the mazda r4 13b engine ant much info to find on these and even harder to find one!
