Ok guys this application is on a Lightning but the same problem should apply to a Cobra. Lets say I want a 2 lb upper pulley on my truck with stock lower(10lbs). If I add a 6lb lower, Im going to gain more than 6lbs correct (16lbs)? I mean if your gains are 2lbs with a stock lower and you add a overdrive lower, your gains will be more correct ? The pulleys achieve boost levels thru ratios, if you alter the ratios you will see different gains than stated, right ?