Cut outs...I would like to hear pros and cons.

I have the manual 3 wing nut ones on my duster may have opened them a few times the car runs the same numbers at the track weather opened or closed..but the car does sound badass flying down the track with them open:lol::lol::lol:

I had an aprox. 600 h.p. vega w/ dual 3'' dumped , was .003 faster w/o them . never took them off again , figured it was the weight diff , 45 pounds .