I have done some research and found a very detailed hydrogen booster plan that can be built from materials found at Lowes or Home Depot for as little as $100. You can expect between 15%-30% improvement in gas mileage depending on your vehicle. This .PDF file is huge and contains a few different plans. Find [...]

Could not find any specific website for this inventor, Denny Klein.  We would love to hear if anyone has updates on his car.