I am looking to purchase an electric cutout for my exhaust but i have a couple of questions.

The stock cat back is 2.75 and you can only order cutouts in 2.5 and 3

Is it ok to just get the 3 inch and weld it without adapters? or do i need reducers on each end?

Has anyone else installed a cutout on the stock cat-back pipe?

 

I would buy a exhaust pipe stretcher and just stretch ur pipe to the 3" opening and then either clamp or weld . That way if there's a problem it's a lot easier to fix . So get the 3" and adapt the exhaust pipe. Here's a link to a cheap one from harbor frieght that will do the trick and its a little more than adapter fittings and extra clamps .
Large Tail Pipe Expander
Hope that helps

 

3" will work fine just weld it up that's what I did no problems

 

Would you not want to put the cutouts before the cats to get maximum gain? In this case they would need to go in the Y pipe between the manifolds and the cats, which I believe is 2.5" so problem solved. Except now you need two instead of one.

 

Buy the 3" cutout. Good luck using that cheap pipe expander from HF, I bought one and it wouldn't even enlarge mild steel tubing and broke into pieces.

 

i actually have LPP long tubes