So Ryan, now you got me thinking, I have the factory 3.0 resonator mated to the AXLE BACK 4.8iS exhaust, so I have larger freer flow piping from the resonator back, quite the nice tone.

If I wanted to keep the factory resonator in place like you did, and keep my 4.8iS exhaust would I still see same gains from headers and a Shark tune? As you said just reuse the stock exhaust manifold gasket, maybe some new studs/nuts, and a slight modification to fit it since its designed for E46.

How easily would high flow cats be put onto the setup? I can always run the Shark tune, headers, and high flow cats with an L-spacer on the rear o2's, my old VW trick that worked pretty damn well to keep the CEL away.

If slapping headers and high flow cats would keep me under 3-400 bucks and I'd be seeing bitchin gains its something I'd def consider.

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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