2007 Ford Fusion SEL 3.0L V6
The rating is an average to good on the scale mainly because the so called installation manual was useless, and it took me over an hour to install. The process requires you to disconnect and remove the battery from the tray. Thence you must remove the nut and bolt holding the tray down, then you can either remove or loosen the metal bracket that supported the battery to allow enough room. Performance is varied, I have noticed an increase throttle responce and shifting. No doubt its giving power but at the cost of mpg tho. A few weeks before I installed a K&N cold air intake to increasing my default mpg. I've found that simply cruising at 30-50mph speeds really boost mpg, tho sitting at a long light hurts. I'd recommend looking at one's driving habits before buying that way you know if you can git your moneys worth.