I wouldn't trust them. They are sold at Walmart. Never buy plugs from there. Also, $7 isn't greatly expensive. My NGK's for my zilla run me around 5ish. At my old joke, worked in a car part warehouse, there was plugs that cost around 20 a piece. If you want more power and better fuel economy, you will want a better and stronger spark. A better way to get some more power would be to run synthetic oil in your truck. Less friction on the pistons means less power loss which means less fuel usage.
Also that website is a bitch to read, white text with a light blue background? WTF were they thinking. |