there fake but real stuff is in them..the reason people are getting shitty results is cause the amps must have been stocked upside down...if u look close all the amps have a large quantity of white residue on the top of the amp...The residue is actually are the test that stuck up there....turn them upside down,,,warm the oil with a lighter ,,,,u will see the test mix in the oil,,,now put it in the lower part and the sust works damn good...Everybody knows i was the 1st one to blow the wistle on the fake karachis,,,but when my buddies were getting results I tried to figure out why,,,Well thats why..