The Type IV vaporizer is sold on a guaranteed basis of 25% minimum mpg improvement for the larger and 20% for the smaller, for gasoline/petrol engines. For diesels, 10% mpg improvement is guaranteed, and actual improvement should be higher.
There is an inlet for fuel, and an outlet for vapor. There is an expansion vessel as well, which acts as a secondary vaporizer and isolation (backfire suppressor) step. And there is an inlet fuel valve. That is it. There are no moving parts to wear out.
The Type IV vaporizer comes in 2 sizes. The larger is stainless steel, copper and plastic – it's 29cm wide and 20cm tall, and the tube is 50mm wide . The smaller is aluminium, copper and plastic. It's 22cm wide and 18cm tall, and the tube is again 50mm wide. The smaller vaporizer is about 20% less efficient than the larger, but fits in many crowded engine bays,
Prices for the larger vaporizer, including expansion vessel, fuel inlet valve and T connectors, 6-8mm adaptors and clamps, is $179. The smaller version, with the same accessories, is $139. Shipping is free from the UK, and goes all over the world. We don't ask for shipping fees!