Needswings has the cut outs and any exhaust can install them into your exhaust .
this one sounds as it was put in line with the stock exhaust, Maybe mounted just before the resonator,,
but if you look just under the muffler there is a open pipe and he did say muffler delete
a cut out for racing is mounted so you have open exhaust
(loud but more power if modded for open exhaust.)
I did have cut outs on my 10.55 second 1/4 mile crossfire but the mods i had needed more backpressure
so i install 3" exhaust with headers,no cats, no resonator, but ran it through the stock muffler.
( the stock muffler has 2ea, 2.1/4" inlet and 2 ea and 2.5" outlet ) jim