I'll submit a differing opinion. After installing a Fastman TB on my QC the engine performed like a slug - no acceleration and very a noticeable loss of power. I don't know what my TPS reading on the stock TB was, or what it was when I buttoned the Fastman TB onto it. I adjusted the TPS to .604v at idle and it woke the truck up. It is way more drivable now than before this adjustment.