Installing longtubes soon, will cut-outs fit between the longtubes & the stock cats? If so is that 2-1/2 inch pipe between the two? Thanks for the help.

 

Would not fit unless you moved the cat back. Isn't that a little close? Isn't it better to put them further down stream, like just before or after mufflers? That way you don't loose all of your back pressure.

 

Mine is after my high flow cats and before my Magnaflow muffler. Its a dog with the cutout open - although I haven't tried it open w/the nitrous yet.

 

To be honest I couldn't tell any difference with or without cats by the SOTP. I would just be sure that after the cats you have a good exhaust system, or place the cutouts after the cats. I have tried cats and no cats with motor, juice, and blower. It is not worth your time taking the cats out of the picture.
This is my opinion.

 

My cutouts are the same size as the cats, so I just swapped them. But, after running with the cutouts open, my tuneing was off and I didn't gain as much power with them open.

 

So the stock cats don't rob as much power as some people might think? And the suggestion would be to put them behind the cats? Just kind of think that defeats the purpose, but hey that is why I asked. Thanks guys!