like stated above! once i hit 3-4k it pops lika ****! sounds like its coming from the header area! i have dc headers and a magna flow cat ! im new at this! any help would be awesome! thanks b4 hand!

 

whats your engine setup? Did you mess with the distributor at all??? Could be detonating fromt bad gas/too mch timing/too much compression, etc etc....

popping noise....

man, people need to be more specific when they ask questions. Is it your v-tech kickin in or what???

maybe it's cause you have headers....you only need one manifold/header