To run cutouts or not run cutouts, that is the question.

I went with the Summit brand partly because i had a $70 gift cert. and the reviews were pretty good. I've only had them a week so I can't speak to longevity.

Also I'm running 2 1/2" exhaust and you're running 3" so I wouldn't guarantee a .2 improvement, but the fun factor is worth it.

here's the latest pic:

I have those same exact ones on my dart. See video on first page of thread. I highly suggest that you take out the extremely tiny set screws they have holding the valve to the shaft and place locktite on them. The ones on mine vibrated loose and fell off on the road at some point driving and the shaft would just rotate and wouldn't close the valve.