I haven't forgotten about Mallet. They've also got a good reputation, though I haven't seen any mention of SC'd LS6 packages from them at all. They are more about head/cam and N/A packages , IIRC.
I'm watching and listening about a couple of other aftermarket installers that are dropping SC's on the CTS-V, but the nice thing about Mallet and Lingenfelter is that 2-3 year warranties on their parts and the work they do is a standard. Not so with most other places...
I've got it on good authority that the T56 and the stock shafts on the CTS-V can handle a 150-200HP bump over the 400HP that the LS6 puts down just fine, though a few chasis/suspension upgrades (to prevent frame twist) may be in order for those that really get nuts and start putting some serious boost on the LS6.
I guarantee you I won't be pushing for anything past a good tune, blower and pipes on that thing on the performance side. Too much money (past 700HP and you are looking at bottom-end work on the LS6 to stay safe, which is a good $5-7K) and I can kill myself just as easy with 550-600HP on tap as anything above it. Hell, 400HP will be MORE than enough to handle on 245-series tires combined with my rather limited driving skills...
Now if you are talking about shifter feel, I can understand that somewhat. The T56 is a bit "vague" during shifts and is a little on the clunky side, if the one in the CTS-V throws like the one in the C5.
I'm not looking for a drag-car; just an all-around comfy 4-door cruise missle that can tear up a corner every now and then and send most other vehicles at stoplights running home with their tails between their legs.
