I am currently running a hemi scoop on my duster at 130 mph it does lift a fair amount but does not look like its going to rip off I do plan on running some aluminum under frt of opening in hopes of keeping it flat when I seal it to carb.A buddy of mine ran a prostock style scoop on his dart and went to a hemi scoop and it slowed and went to a cowl hood and regained some of it but he also chaned some other things but he always said the prostock scoop was the fastest.Ill be watching this also.