Have you had a chance to try out your heater with the Y pipe yet? I have one sitting around and was wondering if it really made that much difference in heater output.[/quote]
I tried w/o Y-pipe first and was really disappointed. Y-pipe made a huge difference in my setup.
Not specifically for the MC, but associated. IMO, newer F150's suck for backup visibility, especially with tinted front door windows. I added V-LEDS LED plate and reverse lamps. No problem backing up to the trailer now!