used on both. its the 3.5" HFM for you swappers that are just running to stock 3" one from the M50/S50. The injectors are 21.5# versus 17#. Its best to get one chip for both at the same time so:
120 for the HFM
30 for the injectors
or 140+shipping for both.
hit me up if you want pics.
120 for the HFM
30 for the injectors
or 140+shipping for both.
hit me up if you want pics.

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