I put the Flowmasters on my Roush & also a Mac off road H pipe I have had this on at least 5 Mustangs with no problems & great sound in my opinion.
Ok with the Roush when you going down a hill & let off the gas the car pops real badly.
I know the Folwmasters have a rumble when you let off but this is a pop.
Its going on the left around 4:30 to look for a leak my guess is when you let of its sucking in air around one of the mufflers.
My ? is if this does not fix the car could it be because the car has the SC on it with that in mind my Vortech car did not do this.
Ok with the Roush when you going down a hill & let off the gas the car pops real badly.
I know the Folwmasters have a rumble when you let off but this is a pop.
Its going on the left around 4:30 to look for a leak my guess is when you let of its sucking in air around one of the mufflers.
My ? is if this does not fix the car could it be because the car has the SC on it with that in mind my Vortech car did not do this.