Stillen replaced my supercharger a couple weeks ago, because I had gone through 3 intercoolers since August. Each replacement intercooler on the old supercharger only lasted about 1,400 miles. I got about 1,600 out of this one. After an hour of driving the res. level is half empty. Talked with Chuck at Stillen today, and apparently I'm the only one with the problem now. He's going to talk with the GM and get back to me. If any supercharger owners read this, check your intercooler res. level. Is it full? Do your resevoirs stay full, or are you having to add fluid on occasion? This just doesn't make any freakin' sense!!!