This is an auction for step by step plans only.  No actual unit is being sold. Contains: Diagrams and instructions on building a hydrogen generator that has been built and tested. Diagrams and instructions on building your own moisture filter and Spark Arrestor. Diagrams on building your MAP Sensor Regulator. Information on where to get an Oxygen Sensor Extension. Comes on CD ROM Shipped Priority Mail Unlike other offers that just give you a diagram to try and follow, we provide you with step by step instructions on how to build and where to get materials locally.  We won't lie... this item costs about $50 - $60 to build correctly.  Others who say it can be built effectively for under $30.00 are probably not telling the whole story.  Trust WEGO GREENE as others have and you won't be disappointed.   To ensure your satisfaction: Research this item on the web, or call a professional to make sure that it meets your needs. I am not responsible for your buying something you don’t really want or which is not compatible with your equipment, skill level, style, size, etc.     Questions? Ask me! We try to describe the item completely and accurately and try to provide an honest and ethical portrayal of the items that we sell. All defects known at the time of testing are described here, but this does not disqualify the item from additional defects not known to us at the time of inspection and testing       By bidding, you agree to the following terms and conditions: I ship once per week: FRIDAYs. No P. O. Box addresses for items over 3 lbs. – real names and addresses only. Note: Items offered at USPS Priority Mail service which after packing do not weigh over 13 oz. will be sent USPS First Class Mail unless otherwise specified, delivery time will be the same or slightly longer as USPS Priority Mail. All items are sent USPS Parcel Post unless signified differently in auction and may take up to 15 days from shipping date to arrive. Messages asking for changes in terms… like Offers of less than the minimum bid, offers to end the auction early, or asking me to ship to other countries will NOT be answered (unless otherwise specified in the auction). All messages must be sent and responded to through eBay’s message system only for our mutual protection I don’t communicate unless something is wrong, because I believe that’s how it should be… You order and Pay… I deliver quickly and painlessly. The Shipping address must be a Paypal Confirmed address and must eligible for the Seller Protection Policy. Buyers who supply a different address hereby waive their right to file a claim with Paypal due to non-delivery provided I have proof of shipment, with tracking, for your item. You are responsible for the address you give… not me. Any special bonus included with auction is not warranted for condition, usability, authenticity, etc. This item is sold as is and winning bidder understands that there will be no returns on this item unless otherwise specified in description.  We only accept PAYPAL. Please email me with any questions before bidding.   Please ask questions BEFORE you bid.  Payment due within 3 days of end of auction.  Item will be securely packaged and shipped USPS Parcel Post without insurance included unless otherwise specified.  If you would like insurance on the item please request it before making payment. If item is too large for USPS shipping we will ship UPS ground. All shipping charges include cost of handling (packaging material costs, transportation costs, administrative costs) Because of the increasing costs of these services we try to keep them down to a minimum and only pass on a portion of these costs to our customers.Great for experimenting or at your own risk using on your vehicle.  We take no responsibility with how you use this experimental device.  Build and Install at your own risk.