At one time. I bought the Borla headers, cat back dual Borla exhaust, Jet stage 2 chip, 160 T-Stat & K&N Filter for my V10. My Boss at the time just bought a brand new V-10 Ram for himself & paid me cash + some & took all of my stuff & installed on his truck. Complained for months that ever single thing he did & nothing changed. Performance all felt the same. Mileage didn't seem any better. Just sounded louder to me like a UPS delivery truck now. I never re-ordered all of that stuff for mine & to this day is still all 100% stock.