Since my 2016 Cadillac ATS-V is aging out of the Dealer Maintenance period I decided to refresh my OEM air filters.
The LF4 in the ATS-V has dual air filters feeding the twin turbos. The ‘left’ or driver’s side turbo is immediately in from the filter box. The right or passenger side turbo is across on the right side of the engine.
I ordered new filters from Rockauto; they run $28 each as I recall. I ordered a new oil filter at the same time to share in the shipping cost.
The filters themselves are cannister type pleated paper filters, and were made by Mahle for AC/Delco. There is one filter for each turbo inlet tract.
It took only a few minutes to change the filters, then put the 6 screws back snugly in place. My impression is the engineers did everything they could think of to mitigate the need or benefit of an aftermarket intake.
I note that K&N says their intake adds 34 hp, which suggests the stock setup is not ideal, or there are other factors in play. See K&N’s dyno here: