Based on the reviews I've read I bought 2 sets of heavy duty 400 cell high flow coils for my 4th Gen Ram 1500 - 1 set of Magnaflows and these. Before purchasing, I saw several negative reviews about these cats; Warning buyers that some metals are not used, that Magnaflow is better, that the walls are too thin and so on, blah blah blah. From my experience with them they are great. Upon arrival, I immediately noticed that the AutoSaver weighed about 3 pounds more than the Magnaflow. I actually thought that Magnaflow might have accidentally sent me 1 when they should have sent me 2, but after opening the box both were there. When the cats hit the walls, they made a hard, metallic "knock-knock" sound, as opposed to the "ping-ping" sound I heard from Magnaflow magnets. I took my truck to my local exhaust shop and they welded it on with no problems and my truck never gave out a code. These cats are excellent value for money and have given my truck a very obvious sound boost! I didn't know high flow cats would improve the sound so much, but these certainly do, especially if you're already using a cat back setup. I returned Magnaflow and got my money back and am very happy with the result of these High-Flows AutoSavers!
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