wazslow
Well-Known Member
The gen 2 drivers side is the same and must be replaced. You need to use a gen 1 (11-14) manifold on both the gen2 and gen3 to make the sleeper kit work. I didn't need to raise the engine or anything to make the change.To me HP was not the main factor. Being I have a Gen 3 the drivers manifold has to be replaced anyway as the Cat/Manifold are 1 piece. I would have had to buy a stock one from a Gen 2 to install. Since 1 manifold had to come off why not just replace both. Approx $700 more to switch to the 4 to 1 from Hellion IIRC
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