So new OR/Xpipe. Mach 1 Takeoff. Should i spring for flowmasters or just use the stock Mach 1 mufflers?

I wouldnt use any stock Ford muffler in you are looking for a better sound. Get some Force Pros from summitracing.com and take the rear pipes from a Mach 1, or any GT really and it will sound really good.

Matthew