I bought two of these N35 kits. One for my 2000 Ford Excursion and one for my 2004 F-350 Super Duty. My trip is 154,000 miles and my F-350 is 365,000 miles. Both run like new after installation. Installation wasn't difficult, it took about 30-40 minutes for each truck. When you install a kit, you know you are installing quality parts in your car. During the "test drive" you ask yourself why you didn't buy and install it long ago? Immediately noticed the difference and what an improvement inβ¦