hey man.
cutouts are great to have. they free up your exhaust entirely.
im not sure about how the 05's work with back pressure and what not, but if brackpressure plays no part, then cutouts would be awesome.
really, they are old school. the thing are best for is being loud and annoying. just straight header baby.
my bro has them on his 77 trans am, 400 cid big block (6.6 liter).
when he uncorks that monster, you cant even hear yourself think. you get a headache too.
if noise ordinance is in effect in your area, i would not recomend them
check your emissions laws as well, they ARE illegal in PA. (doesnt stop most of us)