2004-2007 Cadillac CTS-V General Discussion Discussion, How to install Zo6 Fuel Rail Covers? in Cadillac CTS-V Series Forum - 2004 - 2007; Does anyone know what mods need to be done in order to install Zo6 Fuel Rail Covers? Tried doing it ...
I installed Z06 covers. I am assuming you mean the FRC from the C5Z? Those will indeed snap right on, however, you have to trim a couple areas for them to fit the V-specific LS6. And this assumes you have an 04-05 V. If you have an 06 or 07, then you need the base corvette LS2 covers, or the LS7 covers. Those will also require trimming, but they should snap on otherwise.
I have an 07 and bought the LS2 fuel rail covers. From what I remember the left one (passenger side) snapped on without trimming. The right one needed to be trimmed to clear the power steering pump, and on the right one the corvette has a fuel line that goes thru the cover where it doesn't on the V (the fuel line is under the cover). So there is a hole in the cover. On the underside of the cover where the hole is there is a piece of plastic that needs to come off to clear the fuel line on the V. Once those are done the thing just clips on.
As I remember the C5Z red covers need the same mods, I did those a long time ago for my '05 V.