Hello, To many who have experienced a short-coming in the stock plenum, you may already have an answer for me. I have recently started experiencing a hissing durring medium accelleration that sounds like massive air flow thru a filterless throttlebody. It goes away or is quieter durring heavy accelleration and low end idleing around town. I know the other symptoms I'm having are due to the plenum needing to be repaired. That is on next month's budget for the Hughes upgraded plenum cover and kit, but I just wanted to know if this is just another symptom of the gasket blown out. Any help?