Exhaust Cut-outs Question... Need Some Input

[srt10ram]

I just ordered two manual cutouts that I plan on placing after my Mac LT's, but before the X crossover. I have a few questions, whats the minimum amount of pipe I would need after the Front 02 sensors which are located 3-4 inches before the headers bolt the X-pipe. I ran open headers and the pulsating caused the o2 sensors to read lean which caused it to be extremely rich and surge at idle/low rpm. I also ran open X pipe with it dumping directly after the X, and I experienced no problems. The cutouts themselves are 10inches long, will I be okay welding them in right after the X-pipe flange which bolts to the headers (12-15in. of pipe when open)? Just want to confirm this before I weld them in, if it surges/pulsates the o2's I will be shit out of luck.

I already know I'll lose some low-end torque (hardly has any already), but I'm fairly certain it will gain 5-10whp up-top, the LS and GT500 crowd have seen gains with cutouts. And it is cammed, so it shouldn't sound too too horrible at idle.
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[lunatikgixxer]

I would put them as far away from the O2s as possible

 

[THE_EVIL_TW1N]

Hopefully you gain something, you never really know. In my brother's 533ci big block Galaxie, it made absolutely zero difference running cutouts on the dyno (540rwhp).

 

[03cobra#694]

From what I've seen in pictures, they usually hang really low.

 

[MalcolmV8]

I've run electric cutouts on a few cars before and I always ended up removing them. They just never seal completely when closed and I always got some stinky exhaust smell in the cab with the cutouts in the closed position. Just a heads up in case that bothers you.
Now if you have the kind where you have to get under the car and unbolt a plate and gasket to open them then you'll be fine.

 

[srt10ram]

From what I've seen in pictures, they usually hang really low.

I'm gonna try to angle them down a hair, but nothing extreme, I'll be sure to post some pictures afterwards.

I've run electric cutouts on a few cars before and I always ended up removing them. They just never seal completely when closed and I always got some stinky exhaust smell in the cab with the cutouts in the closed position. Just a heads up in case that bothers you.
Now if you have the kind where you have to get under the car and unbolt a plate and gasket to open them then you'll be fine.

They're the gasket type with 3 butterfly nuts clamping a plate on, seems like I might be able to access them without even jacking the car up, so hopefully it won't be too big of a PIA.

The only problem I see is if I'm sitting at a light with them open and good ole sheriff pulls up behind me.

Does anyone have any hard data/power numbers with cutouts on boosted mod-motors? I see alot of high HP guys swap to big primary LT's and full 3in. exhaust.