Cold start with factory muffler/resonator delete and cold start with black widow venom 250/resonator delete. Will do a better sound clip video once I get a resonator reinstalled.
update: check out this video to hear flopro twister and for more than just a cold start.
• F150 Tremor 3.5 WOT exhaust sound (bl...
#f150 #f150tremor #f150mods #blackwidowexhaust