i think so just cause there a liitle cheaper and have the HVMC's. the only thing that is keeping me away from the qtp's are there y-pipes. ive only heard bad things about those. so im gonna dish out the extra cash for the kooks. either way you know you have top of the line.
I beleive its worth it. Horse power numbers prove it. And do not get scared with there y pipe. When it is installed on a lift by a professional its great like mine. Just do not try it on your back in your drive. Thats where all the complaints come from.
Kooks now come with ventury collectors wich is around the same thing!!! but the huge horse power gains that come with these collectors are only seen when you are making big horse power not so much with light mods.