will this cutout fit the 4.6?

Not too positive if it would fit but it seems like it would. I would just go to summitracing.com and buy their cutouts which seem to be exactly the same because I bought the 2 3/8" cutouts and they fit fine.

Quote from the site
"Simply remove 3 wing nuts for race-proven .3 seconds quicker ET's! 16-gauge steel tubing is fully mig welded and includes 3-bolt header flange and gaskets that allow them to be bolted directly to you headers or mounted as a slip fit to your exhaust pipes. Mustang-style Race Readies are a slip fit on any OEM Mustang and most other vehicles with 2.25'' pipes. 1/pkg."

does that answer it? its at the bottom. I wouldnt get that though. The 4.6 need some back pressure.