Remembering that A fair amount of the people who are going to use such a guide to install the kit, are not going to be extremely technical types.
Out of the three guides it is the best value and pretty cheap at the price of $49.97. If you think about the cost savings of 50% more mileage per tank, it will not take very long to recoupe ones investment with this.
A good guide overall, sold at a fair and good value price.
