The 4.8 mufflers are different from the 4.6's even though the tips are the same. The 4.8 mufflers are the "throatier" ones. I have them on my X, little more grumble but still oem quiet. I contemplated deleting the resonator and adding a magnaflow resonated Xpipe but I don't want much more noise and want to maintain zero drone. It's not a race car this 5MT 3 ton X5

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards