Those were "mufflers" you deleted. Not resonators. But thats a very interesting looking straight pipe solution you have there. Those tips look a lot nicer than what you typically see on the agency power/megan exhaust.
Good luck with the sale!
///2013 AW 6MT E92 ZCP M3 ESS-550/// Black 359M Wheels/BMW Performance Carbon Fiber Spoiler and Mirror Caps/Arkym AeroSport Front Lip/Turner 15MM Spacers/LUX 8 LED Halo/IND Gloss Black Grills, Gills and M3 Emblem/30% 3M Tint/BMW Interior LED/MusicCar Subwoofer Enclosure/JL Audio 12" W6 Sub and XD600:1 Amp/Euro Sunglasses Tray/Ceramic Coated Megan Racing Exhaust/AFe Dry Air Filter/RPI Intake Scoops/Euro MDM/Feature Coded.