It's got 100,000 miles on it so I'm pretty impressed it lasted this long. I'm still curious as to what's making noise and why though. I pulled the larger injectors too and replaced them with stock parts. What a difference. It's kind of a bummer not having the extra power anymore. You really notice it. Especially on grades. I sometimes need to downshift now where as before I could lug the engine or gas it whenever I wanted. The extra 100hp make a huge difference. On the plus side I switched back to less-expensive regular unleaded fuel. And I get better gas mileage too. The Project TJ rolls on 35-inch tires with 4.56 gears and was getting 11.5mpg with the Avenger Supercharger. Without the supercharger I'm getting 14mpg. Everything is stock except for the Airaid open-element filter kit. The intake tube and exhaust are all stock parts.