can we all jus get along. the info on this is on competitiondiesel ,do a search,CFM INTAKE,read BOOOOOOM!!!!!!,posted by KANTDRIVE55,he states H2O METH . Quote just alittle while on the dyno,its really about hoods being up while on the dyno, n stuff happens,O-WELL,THANKS JOE HELLMANN,great product,craftmanship,n price