I have a 99 cherokee, I had installed a magnaflow glasspack about 6 months ago, since then my tailpipe has rusted and fallen off. I'm looking to make the jeep a bit louder and add a little pop to it. I'm thinking of reducing the size of the tailpipe from 2 1/4 down to 1 3:4. Would this create too much back pressure? I've done this before on old cop cars, wondering how this will work out on my cherokee? Any help is appreciated.