I've had mine about a year. Still works great. Faster start, no lift pump noise, quieter in the cab (wife thinks). I have left the truck in 26 degrees for ten hours several times this year and had it started right up. Only problem was with the fuel pressure sender failed. No fault of the fass. Changed the stock filter on the engine, it still was clean and could have been reused after 10,000 miles. Mine is installed on a 98 12v.