I have a 97 F150 4.6 liter and I am considering putting a Flowmaster Cat Back system on, but am wondering with the 4 stock cat convertors on there if I will be able to really notice the flowmaster? Anyone have any input on the sound or if it sounds good?

 

You'll definitely notice it!

 

you will definitely notice it. my truck already had one on it when i got my 97 with the 4.6 ran out the back. you will hear it on acceleration, once you get up to speed you won't notice it. it wasn't load enough for me out the back so i put turndowns on right after the flowmaster, i wanted load and now i have it