Yeah I decided to dump it. I'm doing a single dump out before the passenger rear tire. Idk what for muffler it'll be done Friday or Saturday

 

generally duel pipes rust out faster, if made of straight steel. allso high flow pipes give most improvement at higher rpm. if you are making a street racer the high flow is what you need. my driving is not average, 95% of my driving is under 40 mph. i go above 3,000 rpm less than 5 times a week. i would give up some high rpm power to gain low end power.