Rideout Thoroughbred Diesel Verified Purchase 10/7/2018 - 7:06 PM Permalink Report 2 out of 2 people found the following review helpful 3.5 out of 5 Great Value-There can be a drone noise issue Vehicle Info: 2005 Dodge Ram 2500 4X4 (Long Bed) Installation was easy and straightforward. Plenty of videos of this setup or similar setups to understand how it should be put together. This product did allow for my truck to get an additional 2 MPG on both city and towing driving. I am running a stock truck other than this setup so I am not able to monitor the EGTs to know the performance for that aspect. The one issue I did have was the drone noise starting at 2,000 rpms +. It was really loud in the cab and even worse when climbing hills with a trailer. After one boat trip to the lake (8hrs) and the wife informing me of the annoying noise I researched for a resonator. Installed the Flo Pro Twister and was impressed with how it has removed the drone issue. My recommendation if switching to a less restrictive setup is to keep in mind that a resonator might be needed. Would you recommend this product to a friend? Yes Comment | Was this review helpful? Yes | No Name Leave a Comment Submit Comment