there are some good threads on this in here, do a search. You will be okay, shouldnt lose power. Have the reso delete on mine and I am happy of course I hadded some 44super flows and love it. Had a magnaflow catback on my 6.1 charger and was happy too, but when I gained 4rwhp on the dyno with the catback, was not really worth the $1,000.00 I spent for that, I started maybe thinking the SRT crew knows what they are talking about when they said the stock exhaust flowed really good and a aftermarket exhaust would be minimum gains and more for a aggressive sound and maybe weight savings especially for auto's because those damm suitcase mufflers weigh a ton!