off road x pipe

Hello I'm new and don't know a lot about Fords, I have a 68 Dodge Charger R/T as well as a 1956 Cadillac Coupe Deville. I do all my own work and really enjoy wrenching on cars. My newest acquisition a 1989 Mustang LX 5.0 hatch that is nicely equipped but needs that extra umph. I'll post pics...

Hello! New here and need some help. I have 2012 5.0 and just installed UPR o/r x pipe. Having roush ab's on I wanted it louder with is why I went catless. After the tough install, (due to unbolting in a very awkward area using jackstands) it sounded great and I really loved the sound. But after...