i will be running screens on them for filters but i think an itg single plate or sock type filter would fit fine. they cost just above 2k for every thing shipped from hayward performance, that's just above twm and below toda, the price verries depending on the size and linkage setup. with these one's i can now put a hood back on my car and the throttle is smooth like stock. the twm's are a straight line threw the port design, with a flashlight i could literaly see straight thew the throttle plates and threw the valves to my piston, although they do have the ushual twm sticky throttle(not bad, just had to tap the throttle to bring down the idle). that's why i would recomend them for race and these for street.